Provide the Structure of the Ylide Needed to Prepare 3-Ethyl-3-Heptene

question 39

Multiple Choice

Provide the structure of the ylide needed to prepare 3-ethyl-3-heptene from 3-pentanone using a Wittig reaction.

• A) Ph₃P=CH(CH₂CH₃)₂
• B) Ph₃P=CHCH₂CH₃
• C) Ph₃P=CHCH₂CH₂CH₃
• D) Ph₃P=CH₂
• E) Ph₃P=CHCH₂(CH₃)₂

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