Question

Complex [ni(pph3)2cl2] what's its coordination number and geometry ???

Answer 1

the geometry of Ni(c o)4 is tetrahedral , and the geometry of Ni9pph3)2cl2 are square planer . 
Reason – ni(co) 4 is a unusual complex , it has ni in 0 oxidation state , thus there are 8 electrons in 3d aND 2 electrons in 4s . co is the strongest ligand and does cause pairing by leaving 1 empty d orbital . now , pair electron is 4s shift to 3d leaving 4s orbital empty . and free to accomdate electrons from co . so, there are no free d orbital as its a weak ligand , so, it has sp3  hybridization means tetrahedral geometry

Answer 2

The coordination number is 4 and the geometry is tetrahedral

• The IUPAC name of the given complex is dichloro bis(triphenylphosphine)nickel(II)
• It is having tetrahedral geometry.
• Ni²⁺ is the central metal ion.
• It has two ligands: PPh₃ and Cl⁻
• Cl⁻ is a monodentate ligand, as it has 4 monodentate ligands, and its coordination number is four.
• The given complex is neutral as it has got no charge
• #SPJ2