Consider following statement(s) in the context of NO and CO ligands A. In the bent mode, NO donates three electrons to the metal center. B. In IR spectrum, the vNO for the bent nitrosyl ligand typically lies between 1525 and 1690 cm⁻¹ C. The HOMO of NO and CO are π* and σ orbitals, respectively

Q19 · CSIR-NET Chemistry, June 2021

Paper: CSIR-NET June 2021 · Subject: Inorganic Chemistry · Chapter: Organometallic Compounds · Topic: 18 Electron Rule · Marks: 2 · Difficulty: Easy

Consider following statement(s) in the context of NO and CO ligands A. In the bent mode, NO donates three electrons to the metal center. B. In IR spectrum, the $\mathrm{v}_{\mathrm{NO}}$ for the bent nitrosyl ligand typically lies between 1525 and $1690\,\mathrm{cm}^{-1}$ C. The HOMO of NO and CO are $\pi^{*}$ and $\sigma$ orbitals, respectively

(a)A only

(b)B and C

(c)A and C

(d)A and B

Answer

Answer: B ✓ checked by 4AB · confidence medium

Explanation

Bent NO is a one-electron donor (neutral counting), so A is false; bent ν(NO) lies ~1525–1690 cm⁻¹, and the HOMO of NO is π* while that of CO is σ — B and C (b).

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