Paper: CSIR-NET June 2014 · Subject: Inorganic Chemistry · Chapter: Chemical Bonding · Topic: Chemical Bonding – General · Marks: 2 · Difficulty: Medium
The maximum bond order obtained from the molecular orbitals of a transition metal dimer, formed as linear combinations of d-orbitals alone, is
(a)3
(b)4
(c)5
(d)6
Answer
Answer: C ✓ checked by 4AB · confidence high
Explanation
Five d orbitals give one σ, two π and two δ bonding combinations: a maximum bond order of 5 (e.g. Mo₂, Cr₂ quintuple bonds).