I. Results Started with : 40mL acetic acid 4.005g PHPB 2.00g trans-stilbene 1.54g KOH 13mL methanol 21mL ethylene glycerol 2.726g stibene dibromide produced Actual yield : 0.818g diphenlacetylene Melting Point : 62 - 75 degrees Celsius II. Discussion The experimental melting point range of our purified product was 60 degrees Celsius when researched‚ but when done experimentally was only. This began around the right range‚ but ended up being much higher than the literature value
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rice bran oil and fermented rice with red yeast High lysine corn (low glycemic index) Virgin coconut oil (VCO) and monolaurinSugarcane and Banana Sugarcane -- source of alpha-hydroxy acids (AHAs) -- source of the phytoalexin piceatannol (a stilbene) Banana -- complex genome (A and B) -- table bananas and plantains (cooking type) -- major source of potassium‚ tryptophan and oligofructans -- polyphenols and oligofructansFruits and Vegetables Papaya as AntiCancer and Health Drink Bionormalizer
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Organometallic preparation and addition to carbonyls‚ Wittig reagent preparation and Wittig rxn‚ Wolff‚ H-based nucleophile carbonyl reduction‚ imine formation‚ reductive amination (rxn only)‚ ketal/acetal formation‚ dithiane chemistry (rxn only)‚ alpha-bromination of ketones‚ -COOH properties (the trends on HW4)‚ Fischer‚ acidic/basic hydrolysis of esters/amides/nitriles‚ CH2N2‚ acid chloride formation (rxn only)‚ acid chloride rxns with esters and amides. 2 Rxn of carboxyllic acid derivatives w/organometallic
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or SN2). OH O H H Br H + :Br : SN2 :Br : O H H Br + H2O OH O H Br O + H2O + :Br : SN1 :Br : Br 7. Give the structure of the principal organic product formed by photochemical bromination of methylcyclopropane‚ draw the mechanism of the reaction. Br2‚ h h Br Br H . .Br Br Br Br 2Br . . + HBr Br + .Br
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atoms and label each chiral carbon as (R) or (S). 7. Give the stereochemical relationships (same compound‚ structural isomers‚ distereomers‚ or enantiomers) between each pair of isomers. 8. Consider the following free radical bromination of an enantiomerically pure alkane. Is the product formed as a single enantiomer or a racemic mixture? Is the product optically active or optically inactive? Explain your answers. Substitution and elimination reactions (Chpt 11): 9.
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Additional Questions: 1. H H H C C H H C C H C H H C H H Compound A Compound A is an intermediate compound found in a production plant attempting to synthesise n-hexane. a) List three physical properties of alkynes. b) Give the IUPAC name of compound A. [3 marks] [2 marks] c) There are several ways to form the final product from Compound A. An operator has decided to use Pt catalyst to react with Compound A. Write the complete chemical reaction equation. [3 marks] d) The quality assurance
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Unsaturated Hydrocarbons Unsaturated hydrocarbons Have fewer hydrogen atoms attached to the carbon chain than alkanes. Are alkenes with double bonds. Are alkynes with triple bonds. 1 Structure of Alkenes Alkenes (and alkynes) are unsaturated hydrocarbons Alkenes have one or more double bonds The two bonds in a double bond are different: - one bond is a sigma () bond; these are cylindrical in shape and are very strong - the other is a pi (π) bond; these involve sideways overlap of
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Chemistry 140A TOTAL POSSIBLE: 250 Fall‚ 2009 POINTS MISSED: - 0 Second Midterm Exam-250 points 11/19/09 TOTAL: 250 DO NOT OPEN THIS EXAM UNTIL INSTRUCTED TO DO SO.....FILL OUT THE FOLLOWING INFORMATION NOW: . LAST NAME (Print): KEY FIRST NAME (Print): Ima PID: __________________________________________________ SIGNATURE: __________________________________________
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using the resulting aldehyde‚ along with 2‚4-dimethylpyrole‚ a BODIPY dye was obtained [36]. To facilitate intersystem crossing‚ the 2- and 6- positions of the boradiazaindacene ring system were iodinated with an iodic acid-iodine mixture [37]. Bromination at the same positions was performed via N-bromosuccinamide (NBS) [38]. 8-Palmitoyl-1‚ 3‚ 5‚ 7-tetramethyl-2‚ 6 diiodo-4-bora‚ 3a‚ 4a-diaza-s-indacene was obtained by the iodination of 8-palmitoyl-1‚ 3‚ 5‚
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Through vaporized solder the diode flashed red. Lub-Dub‚ Lub-Dub. It works! After weeks‚ my digital stethoscope was finally functioning as I had designed. The project started with the simple ambition of listening in on my preceptor’s stethoscope while he performed a heart exam‚ but ended up answering an imperative question about my medical future. In that moment I realized that my varied interests‚ individual strengths‚ and desire to be challenged converged into a single medical field; radiology
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