The number of all the possible stereoisomers | vedclass

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(B) The given compound is $1,2,4,5$-tetramethylcyclohexa-$1,4$-diene. It has two chiral centers at positions $1$ and $4$ (if we consider the substitut

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$3$

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(B) The given compound is $1,2,4,5$-tetramethylcyclohexa-$1,4$-diene. It has two chiral centers at positions $1$ and $4$ (if we consider the substituted carbons). However,due to the symmetry of the molecule,we analyze the stereoisomers: $1$. The $cis,cis$-isomer (meso compound,optically inactive due to a plane of symmetry). $2$. The $trans,trans$-isomer (chiral,exists as a pair of enantiomers). $3$. The $cis,trans$-isomer (meso compound,optically inactive due to a center of symmetry). Thus,there are a total of $3$ stereoisomers possible.

The number of all the possible stereoisomers formed by the given compound is

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