Q75 · CSIR NET Chemistry, December 2013
Paper: CSIR NET December 2013 · Subject: Inorganic Chemistry · Chapter: Organometallic Compounds · Topic: Organometallic Compounds – General · Marks: 2 · Difficulty: Medium
Substitution of L with other ligands will be easiest for the species
(a)

(b)

(c)

(d)

Answer
Answer: C ✓ checked by 4AB · confidence high
Explanation
Indenyl effect: η⁵ → η³ ring slippage restores the benzene ring's aromaticity, opening a site for associative substitution. Indenyl complexes substitute far faster than Cp, Cp* or arene complexes (c).
Study loop for Organometallic Compounds