CH3CH=CH-CH-CH=CHCH3 with CH3 attached above the fourth carbon. How many stereoisomer(s) is/are poss — AITS & Test Series Chemistry Question

💡 Solution & Explanation

Due to double bond, the geometrical isomers are: 3 3 CH CH CH CH CH CH CH      CH3 Cis Cis Trans Trans Cis Trans Trans Cis Identical When the double bonds are Cis and trans, the molecule becomes optically active.  For trans Cis(two optical isomers are possible)  Total no. of stereoisomers are: Geometrical (2) + Optical (2) = 4