CHEMISTRY · Single correct · ISC · Chemistry · d- and f-Block Elements · d- and f-Block Elements
Problem
In the isoelectronic series of metal carbonyl, the CO bond strength is expected to increase in the order :
(1) [Mn(CO)6]+<[Cr(CO)6]<[V(CO)6]−
(2) [V(CO)6]−<[Cr(CO)6]<[Mn(CO)6]+
(3) [V(CO)6]−<[Mn(CO)6]+<[Cr(CO)6]
(4) [Cr(CO)6]<[Mn(CO)6]+<[V(CO)6]−