Ligands are broadly classified into two classes classical and non-classical ligands, depending on their donor and acceptor ability. Classical ligands form classical complexes while non-classical ligan

Question

Ligands are broadly classified into two classes classical and non-classical 
ligands, depending on their donor and acceptor ability. Classical ligands form 
classical complexes while non-classical ligands form non-classical complexes. 
Bonding mechanism in non-classical is called synergic bonding.

Prashant Kotian · Accepted Answer

Correct answer: C. Step 1: Identify that CN^-, CO, and NO^+ are 14-electron isoelectronic species (CN^- = 6+7+1 = 14; CO = 6+8 = 14; NO^+ = 7+8-1 = 14). Step 2: According to molecular orbital (MO) theory, any 14-electron diatomic species has a bond order of 3.0 with all electrons paired in the molecular orbitals. Step 3: Consequently, all three species are diamagnetic and possess a bond order of three, matching option (a).

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