How many stereoisomers does the molecules have? CH _3 CH = CHCH _2 CHBrCH _3

NEET 2008 Chemistry question

How many stereoisomers does the molecules have?

(1)2
(2)4Correct
(3)6
(4)8

Answer: (2)

Solution

Count the sources of stereoisomerism in . (i) The double bond: each doubly bonded carbon carries two different groups (/H on one carbon and /H on the other), so geometrical (cis/trans) isomerism is possible: 2

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Question ID VK-090022