Q. In Fe(CO)5 , the Fe-C bond possesses
NTA AbhyasNTA Abhyas 2022
Solution:
In a metal carbonyl, the metal-carbon bond possesses both $\sigma $ and $\pi $ characters. A $\sigma $ -bond between metal and carbon atom is formed when a vacant hybrid orbital of the metal atom overlaps with an orbital of C atom of carbon monoxide containing a lone pair of electrons .
Formation of $\pi $ -bond is caused when a filled orbital of the metal atom overlap with a vacant antibonding $\pi ^{\star}$ orbital of C atom of CO. This overlap is aslo called back donation of electrons by metal atom to carbon.
(a) The formation of the metal $\leftarrow$ carbon $\sigma $ - bond using an unshared pair of the C atom . (b) The formation of the metal $ \rightarrow $ carbon $\pi $ - bond.
The $\pi -$ $\sigma $ -bond. overlap is perpendicular to the nodal plane of
Formation of $\pi $ -bond is caused when a filled orbital of the metal atom overlap with a vacant antibonding $\pi ^{\star}$ orbital of C atom of CO. This overlap is aslo called back donation of electrons by metal atom to carbon.
(a) The formation of the metal $\leftarrow$ carbon $\sigma $ - bond using an unshared pair of the C atom . (b) The formation of the metal $ \rightarrow $ carbon $\pi $ - bond.
The $\pi -$ $\sigma $ -bond. overlap is perpendicular to the nodal plane of