In metal carbonyl having and genral formula `M(CO)_(x)`, where, M = metal, x = 4 and the metal is bonded to

In metal carbonyls, metal ligand sigma bond is formed by :

The formula of chloride of metal M is MCI. The metal M belongs to ____.

In metal carbonyl (organometallic) complexes, the M-C bond is

In metal carbonyl (organometallic ) complexes , the M -C bond is

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 one of the following metal carbonyl involves the d^(2)sp^(3) hybridization for the formation of metal-carbon sigma" "bonds and is paramagnetic ?