Question

A wittig reaction with an aldehyde gives

• A. ketone compound
• B. a long chain fatty acid
• C. olefin compound
• D. epoxide

Hint:

Wittig reaction converts carbonyl compounds into alkenes using phosphonium ylides.

Answer 1

The Correct Option is C

Step 1: Recall Wittig reaction.
Wittig reaction involves reaction of an aldehyde/ketone with a phosphonium ylide to form an alkene (olefin).
Step 2: General reaction.
\[ RCHO + Ph_3P=CHR' \rightarrow RCH=CHR' + Ph_3P=O \]
Step 3: Product type.
The carbonyl oxygen is removed and replaced by a C=C bond, so an olefin (alkene) is formed.
Final Answer:
\[ \boxed{\text{(C) olefin compound}} \]