Q15 · CSIR-NET Chemistry, June 2011
Paper: CSIR-NET June 2011 · Subject: Organic Chemistry · Chapter: General Organic Chemistry · Topic: Nomenclature Polycyclics · Marks: 2 · Difficulty: Medium
The IUPAC name of the following compound is 
(a)(R)-3- (prop-2-enyl) hex-5-ynoic acid
(b)(S)-3- (prop-2-enyl) hex-5-ynoic acid
(c)(R)-3- (prop-2-enyl) hex-5-enoic acid
(d)(S)-3- (prop-2-ynyl) hex-5- enoic acid
Answer
Answer: D ✓ checked by 4AB · confidence medium
Explanation
The principal chain carries COOH and the maximum number of multiple bonds; with a tie, double bonds are preferred in the chain. That gives hex-5-enoic acid with a prop-2-ynyl group at C-3. The stereocentre is S (d).
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