An organic compound having a carbon attached to four different group is optically actve, But is it that opposite is also true? That is, do all optically active organic compounds have chiral carbons? Not necessarily. Presence or absence of chiral centre is not the sufficiet criterion for optical activity. The ultimate criterion is presence or abosence of either plane or centre of symmtry. Two compounds which are non super im[osabble mirror images of each other are called enantiomers. If a compound contains more than one chiral carbon, new words are required to describe the relationship between various stereo isomers of the compounds. Those words are diastereomers and mesomers.
In the above compound no. of stereogenic centers and no. of optical active isomers possible are.
A. 3,8
B. 3,6
C. 3,2
D. 2,4
