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 p-tolualdehyde
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It occurs in two main forms: amylose and amylopectin Characteristic | Amylose | Amylopectin | Chain | Straight chain | Highly branched | Linkage | 1-4 glycosidic linkage | Both 1-4 and 1-6 glycosidic linkage | % in Starch | 15-20% | 80-85% | No. of Units | 300-500 monomer units | 25-30 glucose units | Molecular Mass | 300 000 amu | 50 000 amu | * Glycogen is a polymer of glucose (up to 120‚000 glucose residues) and is a primary carbohydrate storage form in animals. The polymer
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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 (including
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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 reacted with the strong base to form the enolate ion. Therefore‚ the
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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 reaction‚ in which the enolate anion
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unconscious when the mind redirects a thought or word dangerous or unacceptable and substitutes it with a more affable thought or word. Condensation; where all the different elements‚ bits and pieces of thought and dreams combine into one to make sense. In this way they can stand for several different thoughts‚ feelings‚ wishes‚ ideas‚ etc. For Freud‚ condensation and displacement / substitution were used as a defense mechanism to contain aggressive and sexual impulses and hide the true unconscious
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for sharing with us your comments regarding the headlight condensation of your S400 vehicle. We appreciate your letting us know regarding the formation of the condensation after driving the vehicle in the mild rain and thank you for your patience so far in this matter. We recognize your concern and we believed you would have a better understanding and acceptance to the matter once we have shared this handy information to you. Condensation is defined as the change in the physical state of matter
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Rising Damp‚ Condensation‚ Water Penetration and Leaks in Domestic Traditionally Constructed Dwelling in the UK. This document provides information to help diagnose‚ manage and resolve damp related problems in domestic dwellings. Rising Damp This is the technical term describing moisture rising up a wall. Rising damp becomes evident in the form of stained walls‚ blistering and peeling paintwork as well as salt accumulation up to one meter high. Rising damp can arise for various reasons‚ the common
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cooking inside. This is known as Radio Condensation Fever. Look over to the Wi-Fi router that you are using to look at that funny cat video you are inevitably watching on Facebook as you read this and see if you are feeling their symptoms. Feeling lightheaded? Hot? Vomiting? Feel like you have some shortness of breath? Like your body is slowly becoming like that steak you ate last night? Well you shouldn’t‚ because there is no such thing as Radio Condensation Fever. Nothing that was just said is true
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Anna Nicole Smith (born Vickie Lynn Hogan) (November 28‚ 1967 – February 8‚ 2007)‚ was an American model‚ actress‚ and television personality. Smith first gained popularity in Playboy‚ becoming the 1993 Playmate of the Year. She modeled for clothing companies‚ including Guess jeans and Lane Bryant. Smith dropped out of high school at age 15 and was married in 1985. Her highly publicized second marriage to oil business mogul‚ J. Howard Marshall‚ 62 years her senior‚ resulted in speculation that
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