I came across this question in one of my tests.
The answer assumes the major product (the anti markovnikov one) being formed. That is, I wish to determine number of stereoisomers of 1,2-dibromo-3,4-dimethylcyclobutane. I had a hard time figuring this out.
I have found a total of 10 stereoisomers - 2 are meso-compounds and 4 pairs of enantiomers, just by drawing and visualizing the possible 3-d structures.
However, I am quite unsure of this answer. Does anyone have a systematic way of finding the number of stereoisomers of this compound? Can someone confirm that there are 10 isomers only?
Any help would be appreciated. Thanks in advance!