Select the structure with correct numbering in the chain:
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a
CH52=CH4−CH32−C2≡C1H
b
C1H 3−C2H =C3H −C4H2−C5≡C6H
c
C H72=C H6−C H5=C3H2−C2H=C1H2
d
C H12=C2H −C3H =C4H−C5H2−C6=C7H
answer is D.
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Detailed Solution
(1) C1H2=C2H-C3H2-C4≡C5H ( first priority goes to double bond) (2) C6H3 -C5H=C4H-C3H2-C2≡C1H (According to lowest sum rule) (3) C1H2=C2H-C3H=C4H-C5H2-C6H=C7H2 (According to lowest sum rule)∴ First 3 options are incorrect.