Lab # 5 Wittig Reaction

Lab # 5 Wittig Reaction - Atif Saleem, ID# 19546129,...

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Atif Saleem, ID# 19546129, 03-30-2009, Section 101, GSI: Jason Hudak Chemistry 3BL Lab Report #5: The Wittig Reaction Introduction: The purpose of the Wittig Reaction lab is to combine two starting materials including a Wittig reagent in order to form a product with a newly formed carbon-carbon double bond. This product is also recycled back into the reaction after it is created. In order to isolate the product, column chromatography with the assistance of gravity is utilized instead of capillary action with the usual thin layer chromatography. Sequentially, the lab proceeds in the following order: 1) Two reagents, namely 2- nitrobenzaldehyde and the wittig reagent : methyl( triphenylphosphoranylidene) acetate are combined, 2) The reagents are heated using a microwave , and 3) The products are isolated using column chromatography and filtration. Discussion: My strategy for determining the major alkene isomer in the lab today depended on the following steps: 1) drawing the arrow pushing mechanism for the reaction with the Wittig reagent to predict the possible products which form, 2) Completing the Wittig reaction with the reagents: 2-nitrobenzaldehyde and the wittig reagent: methyl (triphenylphosphoranylidene) acetate, and then isolating the product using filtration, and 3) using NMR spectroscopy to validate the results of the predicted product from the arrow
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Lab # 5 Wittig Reaction - Atif Saleem, ID# 19546129,...

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