Number of geometrical isomers of the compound CH 3 -CH=CH-CH=C=CH-CH=CH-C 2 H 5 are :

Ans. (C) 8. Both C=C double bonds are stereogenic (E/Z each : 2 x 2 = 4). The allene carbon carries different groups at each end (CH=CHCH 3 /H on one side, CH=CHC 2 H 5 /H on the other), so the allene is chiral and doubles the count : 4 x 2 = 8.

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Chemistry - STEREO ISOMERISM Question with Solution | TestHub

ChemistrySTEREO ISOMERISMGEOMETRICAL ISOMERISMMedium2 minQB

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Number of geometrical isomers of the compound CH₃-CH=CH-CH=C=CH-CH=CH-C₂H₅ are :

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Solution:

Ans. (C) 8. Both C=C double bonds are stereogenic (E/Z each : 2 x 2 = 4). The allene carbon carries different groups at each end (CH=CHCH₃/H on one side, CH=CHC₂H₅/H on the other), so the allene is chiral and doubles the count : 4 x 2 = 8.

Stream:JEESubject:ChemistryTopic:STEREO ISOMERISMSubtopic:GEOMETRICAL ISOMERISM

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