Question Bank › Inorganic Chemistry › Organometallic Compounds › ABC26IN1456An organometallic fragment that is isolobal to CH₃ ⁺is · ABC26IN1456 Subject: Inorganic Chemistry · Chapter: Organometallic Compounds · Topic: Metal Carbonyls · Exam: CSIR NET JUNE 2017 · Marks: 2 · Difficulty: Easy
An organometallic fragment that is isolobal to $\mathrm{CH}_{3}{ }^{+}$is
(a) $\left[\mathrm{Fe}(\mathrm{CO})_{5}\right]$
(b) $\left[\mathrm{Mn}(\mathrm{CO})_{5}\right]$
(c) $\left[\mathrm{Cr}(\mathrm{CO})_{5}\right]$
(d) $\left[\mathrm{Ni}(\mathrm{CO})_{3}\right]^{+}$
Answer Answer: C ✓ checked by 4AB · confidence high
Explanation CH₃⁺ has one empty frontier orbital; the 16-electron d⁶ ML₅ fragment [Cr(CO)₅] likewise has one empty σ-type orbital. [Mn(CO)₅] (d⁷) is isolobal with CH₃•.
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