reaction in an Organic Chemistry lab. Its adaptation to a parallel synthesis format is straightforward. Since the dyes vary widely in color‚ the diversity of this parallel synthesis becomes obvious. It includes techniques on diazotization and electrophilic substitiution. The experient belo is made to allow studens to btain pure compounds that can be characterized by NMR and other analytical techniques‚ but color test is well enough for synthesizing the dyes and purification process is omitted.
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Introduction : "Aromatic" and "aromatic compound" sidetrack here. For implications identified with odor‚ see fragrance compound. Two distinctive reverberation types of benzene (top) consolidate to create a normal structure (base) In natural science‚ the term aromaticity is utilized to depict a cyclic (ring-molded)‚ planar (level) particle that shows strange dependability when contrasted with other geometric or connective game plans of the same arrangement of iotas. As an aftereffect of their security
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Alcohols & Alkyl Halides. Nucleophilic Substitution Structure & Preparation of Alkenes: Elimination Reactions Reactions of Alkenes: Addition reactions Alkynes Conjugation in Alkadienes & Allylic Systems Arenes and Aromaticity Reactions of Arenes: Electrophilic & Nucleophilic Aromatic Substitutions B. R. Kaafarani 2 Course Grading Exam I Exam II Assignments Final Exam I: 25% 25% 10% 40% 100% Wednesday‚ March 13‚ 2013; 6:30 PM in Bliss 203‚ 208‚ 209‚ and 210A. Exam II: Wednesday‚ April 10
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In this experiment the objective was to perform a Diels-Alder reaction using cyclopentadiene and maleic anhydride to synthesize the product‚ cis-Norbornene-5‚6-endo-dicarboxylic anhydride. The Diels-Alder reaction is one of the most important reactions in organic chemistry and was first investigated by Otto Diels and Kurt Alder in Germany. It is a [4+2] concerted cycloaddition reaction which involves a diene and a dienophile. The Diel-Alder reaction are mainly used for creating new carbon-carbon
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Analysis of Hydrocarbons Jennifer Alambra‚ Ma. Nancy Anulat‚ Alfonso Apepe*‚ Jacqueline Arsenal 3Bio4 Department of Biological Sciences - College of Science‚ University of Santo Tomas‚ Manila ABSTRACT The unknown hydrocarbon sample was differentiated and characterized by the use of three tests. The outcomes of these tests are as follows: Nitration test (negative)‚ Bromine test (positive) and Basic Oxidation test (positive). From these results the unknown sample can be classified
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carbon is generated‚ which disrupts the cyclic conjugation. In order to regenerate the aromatic ring‚ a proton is lost at the sp3 hybridized carbon. Thus‚ p-Nitroaniline can be prepared by means of electrophilic aromatic substitution. To begin‚ nitric acid needs to be activated as it has little electrophilic power. Thus‚ concentrated sulfuric acid is added to protonate the nitric acid. Dehydration produces the nitronium ion‚ which is a strong electrophile and has most of its positive charge on the nitrogen
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1. The following compound A‚ is used as an artificial sweetener. Compound A (April 2009) (a) Name all functional groups in A (b) For each of the carbon X‚ Y and Z in compound A‚ determine (i) the type of hybridization (ii) the bond angle (c) A is optically active. Mark on the structure the chiral centre(s) in A. 2. (a) Draw structural formula of (i) a haloalkane
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The percent yield was calculated to be 171% indicating a source of error. The high percent yield was due to the product being wet since we did not have enough time to dry the product with the vacuum filter—since we had to evacuate the building due to the fire alarm. If we were able to vacuum filter our product more‚ the percent yield would be close to 100%. 1. Assign the peaks in your NMR spectrum of your salicylic acid. See NMR spectrum on back 2. Assign the peaks in the IR spectrum of your salicylic
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by : Directorate of Education‚ Delhi SOME IMPORTANT REASONING BASED QUESTIONS OF ORGANIC CHEMISTRY 1. Chlorobenzene is less reactive than chloromethane. Ans. In chlorobenzene‚ each carbon atom of benzenering is sp2 hyridised and is electron withdrawing. Chlorine atom donates a lone pair of electron and acquire positive charge. The negative charge is delocalised on ortho and para position by resonance. C-Cl bond acquires partial double bond character and is 169 pm as compared to 17.0 pm in chloromethane
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is a combination of two cyclopentadienide ions with a ferrous cation‚ such that the six pi electrons binds every carbon equally to the metal forming a sandwich type structure. Ferrocene has the properties of both an activated benzene (undergoes electrophilic substitution reactions) and a ferrous ion (oxidation reaction). Glyme and DMSO are used as solvents as they have moderate polarity so they would break up KOH into K+ and OH-‚ without breaking the hydrogen bonding in the hydroxide ion. Cyclopentadiene
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