question_answer

The number of geometrical isomers in case of a compound with the structure \[C{{H}_{3}}-CH=CH-CH=CH-{{C}_{2}}{{H}_{5}}\] is [NCERT 1980]

A) 4

B) 3

C) 2

D) 5

Correct Answer: A

Solution :

  \[\overset{1\,\,\,\,\,\,\,}{\mathop{C{{H}_{3}}}}\,-\overset{2\,\,\,\,}{\mathop{CH}}\,=\overset{3\,\,\,\,}{\mathop{CH}}\,-\overset{4\,\,\,}{\mathop{CH}}\,=\overset{5\,\,\,\,}{\mathop{CH}}\,-\overset{6,7\,\,\,\,\,\,\,}{\mathop{{{C}_{2}}{{H}_{5}}}}\,\] 1.  2. 3.  4.