In metal carbonyls, there is synergic bonding interaction between metal and carbon monoxide. This leads to increase in strength of metal ligands bond and decrease in bond order of CO in carbonyl complex as compared to bond order in carbon monoxide. Simple carbonyls are invariably spin-paired complexes except for vanadium metal. Which of the following statement is false for nickel carbonyl [Ni(CO)_(4)]?

In metal carbonyls, there is synergic bonding interaction between meta

1.	In metal carbonyls, there is synergic bonding interaction between metal and carbon monoxide. This leads to increase in strength of metal ligands bond and decrease in bond order of CO in carbonyl complex as compared to bond order in carbon monoxide. Simple carbonyls are invariably spin-paired complexes except for vanadium metal. Which of the following statement is false for nickel carbonyl [Ni(CO)_(4)]?
Answer» It is a colourless compound. The Ni-C-O group is linear. The FOUR carbonyl group are lying at the CORNERS of a regular tetrahedron. The metal-carbon bond length (for `SIGMA" "bond`) does not alter. Solution :'Cr' has greater electron density than 'W' DUE to small size. Hence Cr is a BETTER `pi`-donor.