Aldehyde Essays & Research Papers

Best Aldehyde Essays

  • Aldehydes and Ketones - 868 Words
    ALDEHYDES AND KETONES Abstract Aldehydes and Ketones have certain characteristics in common. However, both couldn’t exist in the same compound. Some test for the presence of aldehyde was made for this experiment. These tests includes Tollen’s test, Benedict’s Test, 2-4-dinitrophenylhydrazine and Schiff’s test. All the tests conduted yielded same results, that is, formalin and benzaldehyde are aldehyde-containing compounds while acetone is a ketone. On the other hand, effect of acid...
    868 Words | 4 Pages
  • Aldehydes and Ketones - 1045 Words
    Aldehyde and Ketone 1. ALDEHYDE  Definition: An aldehyde is an organic compound containing a formyl group. This functional group, with the structure R-CHO, consists of a carbonyl center (a carbon double bonded to oxygen) bonded to hydrogen and an R group, which is any generic alkyl or side chain. The group without R is called the aldehyde group or formyl group. Aldehydes differ from ketones in that the carbonyl is placed at the end of a carbon skeleton rather than between two carbon...
    1,045 Words | 4 Pages
  • Reactions of Aldehydes & Ketones with NaOH
    E. Reactions of Aldehydes and Ketones with Sodium Hydroxide Objectives: To know the reactions of aldehydes and ketones with sodium hydroxide a) State the function of Sodium Hydroxide in the test. Sodium hydroxide (NaOH) is the oxidizing agent. b) What are the principles involved in the test? What is its purpose? Cannizzaro reaction is a reaction that uses a strong base, such as sodium hydroxide, which results to the formation of a carboxylic acid (or its corresponding salt) and an...
    290 Words | 2 Pages
  • ketone/aldehyde qualitative identification
    Abstract: A qualitative analysis experiment was conducted to determine the identity of an unknown aldehyde or ketone. The tests include a Tollens test, a Schiff test, an iodoform test, and a derivative melting point test. The data of the first three tests was inconclusive. The final derivative melting point test was utilized to successfully determine that the unknown was the ketone, Propiophenone. Introduction: Qualitative analysis is a method or series of methods used to determine...
    2,734 Words | 8 Pages
  • All Aldehyde Essays

  • Analysis of Ketones, Aldehydes, and Alcohols
    Analysis of Alcohols, Aldehydes and Ketones Karl Wayne Mancao, Raphaell Mordeno, Andres Pastrana III*, and Shannen Peñaverde Department of Biology, University of Santo Tomas, Manila, Philippines Abstract The proponents have done several tests for identifying alcohols, aldehydes and ketones. These tests are Dichromate test, Tollens test, Lucas test, DNPH test and Iodoform test. Three samples got positive result in dichromate test and one in Tollens test. Lucas test got one sample that...
    2,579 Words | 10 Pages
  • Reaction of Aldehydes and Ketones with Naoh
    D. REACTIONS OF ALDEHYDES AND KETONES WITH SODIUM HYDROXIDE (By: Mary Deo Luigi J. Mabunay 1N-3) Objective: To determine the reactions of Aldehydes and Ketones when combined with Sodium Hydroxide. Process: * Obtain 5 clean and dry test tubes * Put 2mL of 40% NaOH solution to test tubes 1, 2 and 3 and on test tubes 4 and 5, put 10% NaOH solution * Add 10 drops of the following solution: * Tube 1: formaldehyde * Tube 2: benzaldehyde * Tube 3: acetaldehyde...
    917 Words | 5 Pages
  • Reactions of Carbonyls-Aldehyde/Ketone Analysis:
    Reactions of Carbonyls-Aldehyde/Ketone Analysis: Introduction: The carbonyl group is a rich source of many important reactions in organic chemistry, with two fundamental properties that are primarily responsible for its diverse chemistry. The first is the polarization of the. Carbon-oxygen pi bond, owing to the relatively high electro negativity. The second property of a carbonyl function is to increase the acidity of the alpha-hydrogen atoms, which are the...
    889 Words | 3 Pages
  • Qualitative Tests for Carbonyls: Aldehydes vs. Ketones
    Laboratory #6 Qualitative Tests for Carbonyls: Aldehydes vs. Ketones Introduction Various chemical tests identifying ketones and aldehydes are used in this experiment in order to identify an unknown carbonyl compound. The tests used are: 2,4-dinitrophenylhydrazone test, Tollen's Test, Benedict's Test, Chromic Acid Test, aka Bordwell-Wellman Test, Schiff's Test, and Iodoform Test. These classification tests provide results based on color change or formation of precipitation, which is then used...
    1,251 Words | 18 Pages
  • Substituents on Aromatic Aldehydes and How They Affect E/Z Selectivity in the Wittig Reaction
    Abstract:The Wittig Reaction is a nucleophilic addition in which an alkene is formed as a product. Both the E and Z isomers of the alkene result. Substituents on the aromatic aldehyde affect the E/Z ratio of products that form. In this experiment, a nitro group was used as the substituent in the ortho, meta and para positions, with benzaldehyde as the control. Each of the four aldehydes reacted with (carbethoxymethylene) triphenylphosphorane to produce ethyl cinnamate,...
    4,968 Words | 14 Pages
  • Synthesis of Dibenzalacetone - 1396 Words
    Experiment2: Preparation of Dibenzalacetone Aim: Using the cabon-cabon bond making ability in carbonyl chemistry, Dibenzalacetone is synthesized from 2 equivalent of benzaldehyde and 1 equivalent of acetone in a base catalyzed reaction. Physical Data1: *detailed risk and safety phrases are attached. substance Hazards, risks and safety practices MW (g/mol) Amt. Used Mol. mp (K) bp (K) density(g/cm^3) acetone R11, R36, R67, S9, S25, S26 58.08 0.24 g 0.004 178.2 329.4 0.79 benzaldehyde...
    1,396 Words | 5 Pages
  • Synthesis of Cinnamaldehyde - 5718 Words
    Vidallon, Mark Louis P. Date Performed: February 20, 2012 CHEM44.1 2L Date Submitted: March 12, 2012 MIXED-ALDOL CONDENSATION Synthesis of Cinnamaldehyde I. Introduction Cinnamaldehyde, cinnamic aldehyde or 3-phenyl-2-propenal is the major constituent of cinnamon oil, extracted from several species of Cinnamomum (C. verum, C. burmanii, C. cassia), under the family Lauraceae, a group of evergreen trees. Cinnamon bark (particularly C. verum) yields 0.4-0.8% oil, which contains 60-80%...
    5,718 Words | 24 Pages
  • Lab Report - 470 Words
    Adol Condensation Introduction: This reaction is carried out by adding benzaldehyde and acetone into a flask. The product created is a 1,5-diphenyl-1,4-pentdiene-3-one, which includes two double bonds, and two benzyl ring functional groups. This is a dehydration reaction that occurs twice in order to form the diene. After obtaining the product, via vacuum filtration, it will be recrystallized and then analyzed for purity by determining both products’ melting point. The two products will...
    470 Words | 2 Pages
  • Carbonyl Compounds - 1103 Words
    CARBONYL COMPOUNDS: ALDEHYDES AND KETONES I. Abstract Four samples were placed on separate test tubes namely acetone, acetaldehyde, benzaldehyde, and cyclohexane and six tests were conducted on each of the samples in order to determine the solubility and their reactions to each of the tests. Acetone would only be negative in Tollen’s and Jone’s test; acetaldehyde would be positive in all the tests; benzaldehyde would be positive only to 2,4-DNP test, Tollen’s and Jone’s test; and...
    1,103 Words | 4 Pages
  • Report - 2096 Words
    Experiment #9 – Identification of Aldehydes and Ketones Introduction Aldehydes and ketones share the carbonyl functional group which features carbon doubly bonded to oxygen. In the case of ketones there are two carbon atoms bonded to the carbonyl carbon and no hydrogens. In the case of aldehydes there is at least one hydrogen bonded to the carbonyl carbon; the other attachment may be to a carbon or a hydrogen. In all cases the carbon(s) that are attached to the carbonyl group may be aliphatic...
    2,096 Words | 8 Pages
  • Preparation of Dibenzalacetone by the Aldol Condensation
    Preparation of Dibenzalacetone by the Aldol condensation David o Neill Date of experiment: 14/12/2011 Apparatus Steam bath, ice bath, Buchner funnel, beaker, conical flask, filter paper, TLC apparatus, Melting point apparatus Materials / chemicals Benzaldehyde, acetone, ethanolic sodium hydroxide, ethanol Introduction The synthesis of dibenzalacetone is formed from an Aldol condensation reaction. An Aldol condensation reaction is a very effective way of forming a carbon – carbon bond...
    1,496 Words | 5 Pages
  • Preparation and Identification of Dibenzylidene Acetone
    Experiment: Preparation and Identification of Dibenzylidene Acetone Purpose: Prepare dibenzylidene acetone by the famous Claisen-Schmidt condensation reaction. Learn the experimental skills of organic synthesis, separation, purification, structural characterization by instrumental analysis. Train the ability to solve the practical problems. Principle: Aromatic aldehydes can have aldol reaction with aldehydes or ketones which have α-hydrogen atoms, dehydrate to form high yield of...
    476 Words | 3 Pages
  • The Aldol Reaction Lab Report
    Chem 51LC Experiment 6 Lab Report Aldol Reaction Purpose: The purpose of this experiment is to be able to conduct an aldol condensation reaction using an unknown aldehyde and an unknown ketone. H NMR is used to identify the unknown aldehyde and ketone. Melting point is used to identify the aldol condensation reaction. Theory: Condensation reaction is also known as a dehydration reaction. In the mechanism of condensation reaction, a bond is formed between two molecules and creates water as...
    336 Words | 2 Pages
  • Aldo Condensation - 1382 Words
    Date: 19th February 2011 Topic: Lab report 03 Synthesis of organic Sun Screen Introduction: Aldol Condensation, a useful carbon-carbon bond-forming is the an example of a reaction named based on the type of product formed. This product formed involves two aldehydes or ketones in the presence of dilute base, yields a molecule having both aldehyde and alcohol. The aldol products are β-hydroxyaldehydes or β- hydroxyketones. Condensation reaction is the...
    1,382 Words | 5 Pages
  • lala - 384 Words
    Shabnaz Rob 4.29.14 Aldol Condensation Introduction The purpose of this lab was to prepare dibenzalacetone (1,5-diphenyl-1,4-pentadiene-3-one). The preparation of dibenzalacetone is base catalyzed. It is a compound reaction that involves an aldol reaction and then dehydration. This overall reaction is known as the Clasien-Schmidt condensation. Aldol addition occurs when an aldehyde forms an aldol in equilibrium. Usually two molecules of aldehydes combine with a base...
    384 Words | 2 Pages
  • Analysis of Unkown Formal Lab
    Analysis of an Unknown Mixture Performed: 2/13/14 Submitted: 3/3/14 Abstract: The purpose of this experiment was to separate and identify the two unknown compounds. The sample used was 105 and it contain 2-propanol and 2-heptanone. IR spectrums were taken of the contents of the second and sixth test tubes and showed the presence of an OH functional group and a small amount of ketone in test tube two and a large presence of ketone in test tube six. The average boiling points of the test...
    2,259 Words | 8 Pages
  • Wittig Reaction: Synthesis of Trans-Stilbene
    The purpose of this experiment was to perform a wittig reaction, the horner-emmons wittig specifically, reacting an aldehyde with an ylide to make an alkene. This particular variation of the wittig reaction has several advantages: It gives only the trans product; it uses a much milder base that is easier to handle; and it gives a water soluble byproduct which is easy to separate from the product. The reason that these advantages occur is a change in the structure of the ylide. Instead of a...
    980 Words | 3 Pages
  • Aldol Condensation Lab - 367 Words
     Aldol Condensation Discussion: 1. Aldol condensation reactions take place in basic conditions, where a deprotonated enol becomes an enolate and proceeds to attack the aldehyde. Since the solution is basic, it is able to deprotonate the alpha carbons of the product, which forces the hydroxide groups to leave. The product is then considered to be dehydrated and unsaturated. In terms of our reaction, cyclopentatone is deprotonated to form an enolate, which then attacks the two molecules of...
    367 Words | 2 Pages
  • Multistep Synthesis of Tetraphenylcyclopentadienone - 1664 Words
    Multistep Synthesis of Tetraphenylcyclopentadienone Author: Instructor: Date work performed: 10.18.2012--10.25.2012 Date work submitted: 11.01.2012 Abstract: The aim of this experiment was to perform a multistep synthesis to form tetraphenylcyclopentadienone. The first step of the reactions was to synthesize benzoin from the condensation of benzaldehyde. A yield of 28.91% benzoin was obtained. The MP of benzoin was 127O-130O C and the IR spectra displayed a carbonyl peak at 3415...
    1,664 Words | 6 Pages
  • Aldol Synthesis of Dibenzalacetone - 758 Words
    The goal of this experiment was to synthesize dibenzalacetone by aldol synthesis. The name 'Aldol synthesis' was taken from the words 'aldehyde and alcohol'. This is because the product of this reaction contains both an aldehyde and alcohol. The carbon-carbon bond-forming reaction is referred to as aldol addition. An aldol condensation yields many species of products if the reactant is more than one. Therefore, the aldehyde has to react with itself to yield one product. Procedure: Followed...
    758 Words | 3 Pages
  • Aldol - 677 Words
    Aldol Condensation Wei-Hsuan Tsui 4/16/14 The reaction of an aldehyde with a ketone employing sodium hydroxide as the base is an example of a mixed aldol condensation reaction, the Claisen-Schmidt reaction. Dibenzalacetone is readily prepared by condensation of acetone with two equivalents of benzaldehyde -26 -95 113.9 1. Weigh 0.212 g of pure benzaldehyde directly into a 10 x 100 mm reaction tube....
    677 Words | 3 Pages
  • Chemical Tests for Unknown Functional Groups
    Chemical T ests for Unknowns Chemical tests have been developed as a means of identifying what functional groups are present in an unknown compound. Since IR and NMR spectroscopy has been developed, they are no longer critical to unknown analysis, but they can still be useful for confirming what you have determined by spectroscopy. Some of them look cool too! In order for a chemical reaction to work as a chemical test, it must 1) create a visible result (a color change, a precipitate, etc)...
    1,882 Words | 7 Pages
  • Synthesis of Dibenzalacetone by the Aldol Condensation
    Experiment 11: Synthesis of Dibenzalacetone by the Aldol condensation Introduction: The Aldol condensation reaction, under basic conditions, involves the nucleophilic addition of an enolate ion to another carbonyl group. The resulting product, a beta-hydroxy ketone or aldehyde, is called an aldol because it contains both and aldehyde group and the hydroxy group of alcohol. Condensations, including aldol condensation, combine two or more molecules, typically with a loss of a smaller molecule...
    1,119 Words | 4 Pages
  • Chemistry - 1945 Words
    www.ccsenet.org/ijc International Journal of Chemistry Vol. 2, No. 2; August 2010 One-pot Preparation of β–amino Carbonyl Compounds by Mannich Reaction Using MgO/ZrO2 as Effective and Reusable Catalyst Deepak.M. Nagrik (Corresponding author) Department of Chemistry, PLIT and MS Buldana-443001, M.S., India E-mail: dmnagrik@rediffmail.com D.M.Ambhore P.G.Department of Chemistry, Jijamata Mahavidyalaya Buldana-443001, M.S., India Manoj.B. Gawande (Corresponding author) Departamento de...
    1,945 Words | 7 Pages
  • Determination of unknown organic compound
    Bonifacio, Prince Zero P.Date Performed: October 00, 2014 Group No. 1Date Submitted: October 00, 2014 Experiment No. 7 Unknown: 2 Compound: Table 6.1Physical Examination State Liquid Odor Smells like adhesive paste Color Pink-orange Flammability Flammable Table 6.2Physical Constant: Melting Point Parameter Experimental Theoretical (From Literature) Melting Point (oC) Trial 1 Trial 2 Average 88 88 86 86 Table 6.3Solubility Test Sample Solubility Solubility Class Water Ether 5%...
    406 Words | 2 Pages
  • Silver Mirror Experiment - 788 Words
    Silver Mirror Experiment Background: This experiment was first conducted by Bernhard Tollens, it is used to determine whether a carbonyl containing compound is an aldehyde or a ketone. An aldehyde is a compound containing a formyl group (CHO).The experiment involves diamminesilver complex and a chemical reagent (also known as “Tollens’ reagent”) which in this case is glucose. In a successful experiment a reflective silver metal should precipitate, with characteristics identical to that of a...
    788 Words | 3 Pages
  • Chemistry - 474 Words
    NAME OF COURSE COURSE CODE CREDIT TOTAL STUDENT LEARNING HOURS PREREQUISITE LEARNING OUTCOME : : : : Organic Chemistry I CHM 3201 4 (3+1) 160 hours per semester : : None At the end of the course, students will be able to: 1. Define and explain the basic concepts in organic chemistry such as electronegativity, orbital hybridization, nomenclature, resonance and isomerism, as well as organic reactions mechanisms (C4, CTPS) 2. to conduct experiments that demonstrate the characteristic...
    474 Words | 3 Pages
  • Aldol Lab - 498 Words
    1)With 1-mL graduated pipet, measure 0.40 mL of the unknown labled “no.XX-.40 mL 2) With another 1ml graduated pipet measure 0.10 Ml of the unknown labled “no. XX- 0.10 mL” 3) Add the compounds to the same Erlenmeyer flask 4) Add 2.0 mL of 95% ethanol and 1.5 mL of 2 M sodium hydroxide solution to the flask 5)Stir with magnetic stirrer for 15 minutes or longer if precipitate still forming (if cloudy after 15 mina heat mixture on a asteam bath or in boiling water for 10 mins then cool...
    498 Words | 2 Pages
  • Synthesis of Tetraphenylcyclopentadienone: - 552 Words
    Purpose: To synthesize 1,2,3,4-tetraphenylnaphthalene through a two-step synthesis. The aldol condensation reaction between benzil and dibenzyl ketone forms 2,3,4,5-tetraphenylcyclopentadienone, which then reacts with a benzene formed by anthranilic acid and isoamyl nitrate in order to yield 1,2,3,4-tetraphenylnaphthalene. Reaction Equation A: Synthesis of 2,3,4,5-tetraphenylcyclopentadienone: A solution of 4 capsules potassium hydroxide (0.5g) and 5mL anhydrous ethanol was prepared...
    552 Words | 2 Pages
  • Synthesis of Adipic Acid - 1681 Words
    Experiment 8: Synthesis of Adipic Acid Performed November 8th & 10th By Jennifer Seitz Organic Chemistry 344 Section 803 Fall 2011 Objective: The purpose of this experiment was to synthesize adipic acid from cyclohexanol via an oxidation reaction that was catalyzed by sulfuric acid. Purity of the product was assessed by measuring the melting point. Physical Properties/Structures: Name | Formula | Molecular Weight (g/mol) | Boiling Point (0C) | Melting Point(0C) |...
    1,681 Words | 6 Pages
  • Identify an Unknown Carbonyl Compound
    Identify an unknown carbonyl compound © KCl http://hk.geocities.com/fatherofchemistry Objective To classify a carbonyl compound by a simple test and to identify it by the precipitation of a derivative. Principle In this experiment, the unknown compound is either an aldehyde or a ketone from Table 90. In the first part, on undergoing Tollen's & Fehling's tests, ketone will have no reaction. In the second part, by preparing a derivative of the compound with...
    503 Words | 3 Pages
  • Formal Report Exp 9
    University of Santo Tomas Faculty of Pharmacy Organic Chemistry Laboratory APPLICATION OF DIFFERENT KINDS OF TEST TO CLASSIFY HYROXY- AND CARBONYL-CONTAINING COMPOUNDS Jane Catherine SP. Villanueva, Edenn Claudine C. Villaraza, Lorenz Oliver C. Villegas and Cristel Bernice T. Wee Group 10 2G-Medical Technology Organic Chemistry Laboratory ABSTRACT Hydroxyl group refers to a functional group containing OH- when it is a substituent in an organic compound. It is also known as the...
    6,343 Words | 21 Pages
  • Preparation of 2-butanone - 823 Words
    Nor Amirah Farhana Nawawi, Mia Organic Chemistry Lab Report 2 Jessica Sammons TITLE: Preparation of 2-butanone INTRODUCTION: The goal of this experiment was to prepare 2-butanone from 2-butanol. Chromic acid was used in this experiment to in order to prepare 2-butanol. Cr (VI) is rather orange, but Cr (III) is dark green - therefore by oxidizing the alcohol (2-butanol), an orange Cr (IV) is reduced to green. NMR and IR tests were taken to determine the result, and the crystallized derivative...
    823 Words | 4 Pages
  • Oxygen Bearing Compounds - 499 Words
    3/5/2011 EXPERIMENT EXPERIMENT 8 OBJECTIVES CONCEPTS REAGENTS PROCEDURE RESULTS DISCUSSION IR ANALYSIS 8 Objectives to differentiate various types of oxygen-bearing organic compounds to device a scheme to distinguish each functional group Analysis of Oxygen-bearing Organic Compounds alanx3@yahoo.com OBJECTIVES CONCEPTS REAGENTS PROCEDURE RESULTS DISCUSSION IR ANALYSIS to characterize an unknown sample through parallel chemical tests ARMSALCEDO ARMSALCEDO...
    499 Words | 7 Pages
  • The Aldol Condensation: Synthesis of Dibenzalacetone
    Objective: The benefit of this lab was to acquaint oneself with the fundamentals of the Aldol Condensation reaction by demonstrating the synthesis of dibenzalacetone (trans, trans-1,5-Diphenyl-1,4-pentadien-3-one) through the aldol condensation of acetone with benzaldehyde. The synthesis began by using a strong base to generate the acetone enolate ion. The ketone/enol tautomerization is an equilibrium process that produces little of the enol (ppm or less). However, any enol that formed quickly...
    996 Words | 5 Pages
  • 2-ethoxy benzaldehyde - 406 Words
     Unknown 1 “2-ethoxy benzaldehyde” The Proton NMR spectrum clearly shows four sets of signals. Those that appear in the region δ7.2 ppm to δ8.0 ppm can be attributed to aromatic hydrogen’s. The up field signal δ1.73 ppm is most likely due to the methyl of the ethoxy group. The quartet at δ4.38ppm is attributed to the oxygen bearing methylene within three bonds away from the methyl hydrogens. This signal shows downfield...
    406 Words | 2 Pages
  • Functional Group Analysis - 855 Words
    Functional Group Analysis: Carbonyl Compounds, Oxidizable Carbonyl Compounds and Acidic Compounds Christian Paul L. Ramos Institute of Chemistry, University of the Philippines, Diliman, Quezon City 1101 Philippines Date Performed: August 24, 2012; Date Submitted: September 19, 2012 Results and Discussion Aldehydes and ketones both contain the carbonyl group – a group in which a carbon atom has a double bond to oxygen. The carbonyl group in aldehydes is bonded to at least...
    855 Words | 4 Pages
  • comparison of india and china architecture
    Reducing Sugars : Sugars that contain aldehyde groups that are oxidised to carboxylic acids are classified as reducing sugars. Common test reagents are : Benedicts reagent (CuSO4 / citrate) Fehlings reagent (CuSO4 / tartrate) They are classified as reducing sugars since they reduce the Cu2+ to Cu+ which forms as a red precipitate, copper (I) oxide. Remember that aldehydes (and hence aldoses) are readily oxidised (review ?) In order for oxidation to occur, the cyclic form must first...
    324 Words | 1 Page
  • Tetraphenylcyclopentadienone for Barbara - 1204 Words
     Tetraphenylcyclopentadienone Joshua Krank Principles of Organic Chemistry Laboratory, Department of Chemistry and Biochemistry North Dakota State University, Fargo, ND 58102 Introduction: The purpose of this experiment was to synthesize tetraphenylcyclopentadienone using a reaction of dibenzyl ketone (1,3-diphenyl-2-propanone) with benzil in the presence of base. The reaction then proceeded with an aldol condensation reaction.5 This product was obtained using extraction (reflux),...
    1,204 Words | 6 Pages
  • Experiment - 499 Words
    Experiment 22 Title: Reactions of aldehydes and ketones Aim: The purpose of this experiment is to compare some reactions of ethanal and propanone. Introduction: We have chosen ethanal and propanone as relatively safe examples of aldehydes and ketones to illustrate their reactions in simple test-tube experiments. The reactions or properties to be investigated are as follows: A. Condensation (addition-elimination) B. Oxidation C. Triiodomethane (iodoform) reaction...
    499 Words | 3 Pages
  • The Wittig Reaction - Lab Report
    INTRODUCTION The purpose of this experiment is to synthesize trans-9-(2-phenylethenyl) anthracene from benzyltriphenylphosphonium chloride and 9-anthraldehyde through the reaction mechanism recognized as the Wittig Reaction. The Wittig Reaction allows the chemist to synthesize phosphoranes in the lab with relative ease. A more recent and inexpensive version of the reaction is the Wittig-Horner reaction (1). ABSTRACT Georg Wittig was a German chemist and Nobel Prize winner in 1979 for the...
    1,092 Words | 4 Pages
  • Robinson Annulation 2 - 209 Words
    Robinson Annulation Robinson Annulation is an useful organic reaction. This reaction is named after a British chemist Sir Robert Robinson. The term 'annulation'stands for 'building a ring'. In this reaction, the formation of α, β-unsaturated cyclic ketones from methl vinyl ketones and aldehyde or ketones takes place. Actually this reaction is a combination of two reactions. One is 'Michael Addition' and the other is 'Aldol Condensation'. Robinson Annulation Mechanism In the first step,...
    209 Words | 2 Pages
  • aldol reaction - 804 Words
    Aldol In this preparative lab, an aldol (trans-p-anisalacetophenone) was produced from the reaction between p-anisaldehyde and acetophenone with the presence sodium hydroxide. The reaction also showed the importance of an enolate and the role it played in the mechanism. Sodium hydroxide acts as a catalyst in this experiment and is chosen because of its basic conditions and pH. The acetophenone carries an alpha hydrogen that has a pKa between 18 and 20. This alpha hydrogen is acidic because of...
    804 Words | 2 Pages
  • Testing for Alkene Functional Group
    Testing for functional groups The chemistry for carbon is vast; there are in excess of ten million known carbon compounds. It is estimated that 300000 new carbon compounds are discovered each year. Organic molecules contain functional groups that are responsible for their chemical properties. Functional groups will react with certain regents in predictable ways, making it possible to develop diagnostic reactions to test for their presence in an organic molecule. Common functional groups...
    503 Words | 3 Pages
  • Sasasas - 377 Words
    Organic Lab 2 February 14, 2009 Experiment 4: Borohydride Reduction of 2-Methylcyclohexanone Introduction: When learning about reduction reactions, we know that the addition of nucleophilic hydride anion (H-) to the carbonyl group will in turn result in the reduction of aldehydes to primary alcohols. Borohydride, and Lithuim aluminum hydride are commonly used as reducing agents. We can note that both of these reagents have a (H-) anion, hence it will be a powerful base and also take...
    377 Words | 2 Pages
  • Solventless Claisen-Schmidt Condensation of Benzaldehydes and Acetophenones
    Backgrounds and Theory (A) Introduction of aldol condensation In an aldol condensation reaction, the α-carbon of an aldehyde or ketone molecule reacts with another carbonyl carbon to form a β-hydroxyl aldehyde or β-hydroxyl ketone, followed by dehydration to give a conjugated enone if an α-H is present. It is a very useful reaction for the synthesis of α,β-unsaturated carbonyl compounds. The aldehyde or ketone molecule is first converted to enol or enolate by acid or base catalyst...
    650 Words | 3 Pages
  • Ochem Lab - 394 Words
    Lab Experiment 8: Oxidation Puzzle Post Lab Report for 2-ethyl-1,3-hexandiol Calculations Theoretical yield: 1.857g Product Yield: 1.055g ----> Percent yield = (1.055g/1.87g) x 100% = 56.41% Starting amount of diol: 1.184g ----> Percent Yield = (1.184g/1.87g) x 100% = 63.32% Spectroscopy O-H (Stretch, H-bonded) C-H (Stretch) C-H (2720-2820 cm-1) Carbonyl C-O (Stretch) Product wavelength cm-1 3422 Strong, Broad 2877,2936,2964 Strong, Medium None Present 1705 Strong...
    394 Words | 2 Pages
  • The Chemistry of Hydroxyl Group - 676 Words
    Experiment 2 Report 班級: ____________ 姓名: ____________ 學號:____________ 桌別: ____________ 組別:____________ 日期:____________ Part A. Preparation of alcohol 管序 溫度 1 2 3 4 5 Test 74 1. Lucas Test Bordwell-Wellman Test 醇之級別 74 74 79 87 發酵前使用的糖為幾克? 15 g 0.0438 mole 應為蔗糖,分子量 2. 發酵液總體積為 87 ml 78.5℃所收集到的是那幾管? 體積和為 3. 2 ,其 ml 發酵液中含有”78.5℃分餾液”佔總體積百分比為 此分餾液總重量 4. 第四管 1.57 g 0.034 此分餾液經鑑定後其結果為幾級醇?...
    676 Words | 10 Pages
  • Experiments - 1824 Words
    EXPERIMENT 1: REACTIONS OF ENOLATE IONS WITH CARBONYL GROUPS Aims In this experiment we used two techniques for the reactions of enolate ions with carbonyl groups. One technique used was Doebner reaction and the other technique used was Claisen-Schmidt reaction. Therefore the aim of this experiment is to synthesize trans p-methoxycinnamic acid and to synthesize dibenzalacetone via an aldol condensation reaction between acetone and benzaldehyde. The products would be recrystallized using...
    1,824 Words | 6 Pages
  • Alcohols - 514 Words
    B. Chromic Acid Test/ Jones Oxidation This test is based on the reduction of chromium(IV), which is orange, to chromium(III), which is green, when an alcohol is oxidized by the reagent. A change in color of the reagent from orange to green represents a positive test. Primary alcohols are oxidized by the reagent to carboxylic aicds; secondary alcohols are oxidized to ketones. Tertiary alcohols are not oxidized at all by the reagent. Hence, this reaction can be used to distinguish tertiary...
    514 Words | 2 Pages
  • Functional Groups - 473 Words
    What is a Functional Group? A functional group is a portion of a molecule that is a recognizable/classified group of bound atoms. In organic chemistry it is very common to see molecules comprised mainly of a carbon backbone with functional groups attached to the chain. The functional group gives the molecule its properties, regardless of what molecule contains it*; they are centers of chemical reactivity. The functional groups within a molecule need to be identified when naming. *Definition...
    473 Words | 4 Pages
  • Catalysis by Hydrotalcite Materials - 2684 Words
    Clays are one of the important natural materials, which have been examined for catalytic applications. Clays are characterized by a layered structure and hence they are slippery when wet. They are broadly classified as cationic or smectite type (having layer lattice structure in which two-dimensional oxyanions are separated by layers of hydrated cations) and anionic or brucite type (in which the charge on the layer and the gallery ion is reversed complimentary to smectite type). Anionic clays...
    2,684 Words | 7 Pages
  • CARBOXYLIC ACID - 608 Words
     CARBOXYLIC ACID Introduction: Organic compounds containing (–C(O)–OH) as a functional group are called carboxylic acids. The –C (O)-OH group which itself is made up of a carbonyl group (>C=O) and a hydroxyl group (-OH) is called a carboxyl group (carb from carbonyl and oxyl from hydroxyl group). Carboxylic acid may be an aliphatic or an aromatic depending upon whether –C–OH is attached to an alkyl group ( or a hydrogen atom) or an aryl group. Their general formulas are; ALIPHATIC...
    608 Words | 3 Pages
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