Q82 · CSIR-NET Chemistry, December 2015

Paper: CSIR-NET December 2015 · Subject: Inorganic Chemistry · Chapter: Organometallic Compounds · Topic: Metallocenes Cp Arene · Marks: 2 · Difficulty: Hard

Correct order of M-C bond length of metallocenes (a-c)

(a)[Fe(η5-Cp)2] 2. [Ni(η5-Cp)2] 3. [Co(η5-Cp)2] is A > B > C

(b)B > C > A

(c)C > B > A

(d)A > C > B

Answer

Answer: B ✓ checked by 4AB · confidence high

Explanation

Extra electrons enter M–Cp antibonding orbitals: M–C Ni(20 e) > Co(19 e) > Fe(18 e) (b).

Study loop for Organometallic Compounds

1. Practise the PYQsPrevious-year questions, with answers

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