Question

The geometry of ni(co)4ni(co)4 and ni(pph)3cl2ni(pph)3cl2 are

Answer 1

geometry of ni (co)4 is tetrahedral( config. of ni 3d10, hybridisation sp3).
geometry of ni (pph)3cl2 is octahedral( config of ni 3d8) as pph is Bidendate ligand