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 correct for metal carbonyls ?

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 correct for metal carbonyls ?
Answer» <P>In general, the effective ATOMIC number for a stable monomeric of the next INERT gas except `[V(CO)_(6)]`. The metal-carbon bond in metal carbonyls posses both s and p character. The C-O bond length in `[Cr(CO)_(6)]` is greater than that in `[W(CO)_(6)]` All of these Solution :'Cr' has greater electron density than 'W' due to small SIZE. Hence Cr is a better `pi`-donor.