Question

Total number of stereoisomers possible for complexes [Cr(Cl₃)(Py)₃] and [CrCl₂(C₂O₄)₂] respectively are

(1) 2, 3

(2) 3, 2

(3) 3, 3

(4) 2, 2

Answer 1

Correct option is : (1) 2, 3

[CrCl₃(Py)₃], this complex is type of [Ma₃b₃], where a and b are monodentate ligands.

There are two possible geometrical isomer facial isomers and meridional and both are optically inactive.

Total number of stereoisomers = 2

[CrCl₂(C₂O₄)₂]^3– , this complex is of type [Ma₂(AA)₂] 

(1)

(2) Optically active

Total stereoisomers = 3