CpM [Cp. is. (η⁵-C₅ H₅)] fragment isolobal with a BH fragment is · ABC26IN1435
Subject: Inorganic Chemistry · Chapter: Organometallic Compounds · Topic: Organometallic Compounds – General · Exam: CSIR NET DEC 2015 · Marks: 2 · Difficulty: Easy
$\mathrm{CpM}\left[\mathrm{Cp}\right.$ is $\left.\left(\eta^{5}-\mathrm{C}_{5} \mathrm{H}_{5}\right)\right]$ fragment isolobal with a BH fragment is
(a)CpGe
(b)CpMn
(c)CpRu
(d)CpCo
Answer
Answer: D ✓ checked by 4AB · confidence high
Explanation
BH contributes 2 skeletal electrons; CpM gives m + 5 − 12: CpCo (9 + 5 − 12 = 2) matches. CpMn gives 0, CpRu 1, CpGe is a main-group η⁵ half-sandwich.
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