Among species, the hybridization states at the Ni atom are, respectively
,
,
As we have learned
Coordination Polyhedron -
Spatial arrangement of ligands around the central atom defines a Coordination Polyhedron.
Types of Polyhedron - Octahedral, square planar and tetrahedral etc.
-
Option 1)
,
,
Option 2)
Option 3)
Option 4)
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