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