The geometry and the number of unpaired electron(s) of [MnBr4]2− , respectively, are
tetrahedral and 1
square planar and 1
tetrahedral and 5
square planar and 5
Br− in a W.F.L. ; C.N. = 4 ; sp3 hybridization Hence number of unpaired electrons are 5.
The geometries of the ammonia complexes of Ni2+, Pt2+ and Zn2+, respcetively, are