INTRODUCTION The study of the Wittig Reaction is important because it is often used to form alkenes from carbonyl compounds. The purpose of this experiment is to isolate the trans‚ trans-1‚4-diphenyl-1‚3-butadiene‚ which is formed by a Wittig reaction along with the cis‚ trans isomeric diene. The reaction is carried out in two steps. First the Wittig salt is obtained through a simple nucleophilic displacement of chloride ion by triphenylphosphine. When treated with base‚ the Wittig salt forms a ylide which
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successfully produce stilbene dibromide by using a more sustainable approach‚ which would prevent less environmental issues. This was done by brominating trans-stilbene and then using the elimination process on the dibrominated product. This process is considered “greener” compared to the original bromination procedures. In order to create the alkyl halides‚ which are able to undergo chemical transformations more readily than the carbon-carbon double bond‚ onto the trans-stilbene the addition process
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Critical Analysis of ‘One Is Not Born a Woman’ by Monique Wittig In her essay‚ One is Not Born a Woman‚ Monique Wittig explains‚ “‘Women’ is not each one of us‚ but the political and ideological formation which negates ‘women’ (the product of a relation of exploitation). ‘Women’ is there to confuse us‚ to hide the reality ‘women’ . . . For what makes a woman is a specific social relation to a man‚ a relation that we call servitude.” Monique Wittig attacks the concept of naturalizing biology and the ‘woman’
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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‚ ethyl-3-(2-nitrophenyl)acrylate
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I picked the second quote‚ “trans fats should not be banned. Consumers should make their own choices about what they eat. The government should educate the population about the risks of eating foods with Trans fats‚ but then let people make their own decisions.” The way I look at this situation is‚ we do a lot of bad things to our bodies. We eat fast food‚ sugars‚ drink alcohol and plenty more. Everything that we take into our body systems‚ has some type of effect on our bodies‚ whether it be causing
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Ban Trans-Fat Although fats are considered to be a part of our health‚ there are certain types that should be ignored. One of which has drawn controversial issues is trans-fat. Trans-fat is mostly found in many food sources such as vegetable oil‚ crackers‚ cookies and margarine. It increases blood levels of low density lipoprotein that is considered to be bad cholesterol‚ and decreases level of good cholesterol‚ high density lipoprotein. Trans-fat is created when oils are partially hydrogenated
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Institute a State-wide Ban of the Use of Trans Fat? Trans fats are a type of fat often used in preparation of fried foods in order to enhance the flavor and‚ in some cases‚ increase the shelf life of a product‚ but these inexpensive‚ artificially produced fats have been liked to heart disease because they increase levels of bad cholesterol in the body while lowering levels of good cholesterol and that is why I agree that we should ban the use of trans fats in New Jersey restaurants and food establishments
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Trans Fats There is lots of controversy going on about should the trans fats be banned by the government or not. On one side are people who are for ban of trans fats‚ while their opponents think that they should not be prohibited. What are the trans fats? Are they really bad for our health‚ should they be replaced with another substance and why there are so many people against them? Producers have the power over us‚ as well as opportunity to put trans fats into food in small amounts‚ without
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The literature value for the melting point range for Trans-9-(2-phenylethenyl)anthracene is 130-133 oC. The obtained range was lower than that at 120.3 to 123.8 oC. Because it is lower than the known value‚ this means the obtain product is not completely pure. Impurities in the compound can result in a decrease in the compounds melting point‚ which is observed here. The impurities could be 1-propanol due to an insufficient drying. If the experiment was performed again‚ the product would need to be
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