The Wittig Reaction - Eric Lee Chem 3BL Vincent Cheng 2...

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Eric Lee Chem 3BL Vincent Cheng 2 April 2008 The Wittig Reaction Purpose : The objective of this lab is to use microwave radiation to heat a Wittig Reaction and then separate the products by using column chromatography. Discussion : The main idea of the Wittig reaction is that an aldehyde or ketone reacts with a Wittig reagent in order to generate an alkene product and the used Wittig reagent. In this particular experiment, there is one major form of alkene, the trans formation. This is different from a regular E2 (or E1) reaction where the double bond could be formed in more than one area. In this experiment there are two major reactants as I’ve mentioned before: an aldehyde and some kind of Wittig reagent. In this experiment, the aldehyde used is the 2-nitrobenzaldehyde and the Wittig reagent used is the methyl (triphenylphosphoranylidene) acetate. The two will form an alkene product with the carbonyl on one side and the nitrobenzene on the other. With this reaction there are two possible conformations of the product: the trans (E) or cis (Z) form. In this
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The Wittig Reaction - Eric Lee Chem 3BL Vincent Cheng 2...

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