Question

Which of the following will give maximum number of isomers? (a) [Ni(C2O4) (en)2]2– (b) [Ni(en) (NH3)4]2+ (c) [Cr(SCN)2 (NH3)4]+ (d) [Co(NH3)4 Cl2]​

Answer 1

(c) is the correct option

In (c) if donor atom of the SCN l i g a n d was specified then all of the options would have had the same number of stereoisomers , i.e 2 , however you'll have to consider both the donor sites of SCN l i g a n d hence there will be 4 isomers of (c)