Identify the major product that is expected when 2-butanone reacts with (Ph)3P=CH2 in a Wittig reaction.Select answer from the options belowbut-1-ene. 1-methyl-but-1-ene. 2-ethyl-prop-1-ene2-methyl-but-1-ene. pent-1-ene.
Question
Identify the major product that is expected when 2-butanone reacts with (Ph)3P=CH2 in a Wittig reaction.Select answer from the options belowbut-1-ene. 1-methyl-but-1-ene. 2-ethyl-prop-1-ene2-methyl-but-1-ene. pent-1-ene.
Solution
The major product expected when 2-butanone reacts with (Ph)3P=CH2 in a Wittig reaction is 2-methyl-but-1-ene.
Here's the step-by-step process:
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The Wittig reaction involves the reaction of an aldehyde or ketone with a triphenyl phosphonium ylide (in this case, (Ph)3P=CH2) to produce an alkene.
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2-butanone is a ketone, and its structure is CH3-CO-CH2-CH3.
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The Wittig reaction replaces the carbonyl group (C=O) in the ketone with a methylene group (=CH2) from the ylide.
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The product of this reaction is an alkene, where the double bond is between the carbon that was part of the carbonyl group and the carbon from the methylene group.
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Therefore, the product is 2-methyl-but-1-ene.
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