Which of the following compounds will show cis-trans isomerism?

(i) (CH3) 2C = CH – C2H5

(ii) CH2 = CBr2

(iii) C6H5CH = CH – CH3

(iv) CH3CH = CCl CH3

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1 Answers

(iii) and (iv). In structures (i) and (ii), two identical groups are attached to one of the doubly bonded carbon atom.

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