|Class 12 Chemistry Coordination Compounds||Organo-metallic compounds|
They are those compounds in which metal or metalloid or a non-metal is directly linked to carbon atom of a hydrocarbon.
For example: (C2H5)2Zn etc
Please note that metal cyanides and metal carbides are not organometallic compounds as in them carbon atom is not directly joined to metal.
Types of organometallic compounds:
Sigma and pi organometallic compounds In detail:
Shapes of these structures are shown below:
For example :
Shape of [Fe(Co)5]
Considering bonding in metal carbonyls: these compounds possess both s and p characters. The M-C sigma bond is formed by donation of lone pair if electrons on the carbonyl carbon into a vacant orbital of metal. The M-C pi bond is formed by the donation of pair of electrons from the filled d orbital of metal into vacant antibonding pi orbital of carbon monoxide. The metal to ligand bonding creates a synergic effect which strengthens the bond between CO and metal as shown below:-