ABC26IN0774 · Organometallic Compounds

Subject: Inorganic Chemistry · Chapter: Organometallic Compounds · Topic: Organometallics – General · Exam: JAM 2005-2022 · Marks: 2 · Difficulty: Hard

The order of increasing CO stretching frequencies in $\left[\mathrm{Co}(\mathrm{CO})_{4}\right]^{-},\left[\mathrm{Cu}(\mathrm{CO})_{4}\right]^{+},\left[\mathrm{Fe}(\mathrm{CO})_{4}\right]^{2-}$ and $\left[\mathrm{Ni}(\mathrm{CO})_{4}\right]$ is
(a)$\left[\mathrm{Cu}(\mathrm{CO})_{4}\right]^{+}<\left[\mathrm{Ni}(\mathrm{CO})_{4}\right]<\left[\mathrm{Co}(\mathrm{CO})_{4}\right]^{-}<\left[\mathrm{Fe}(\mathrm{CO})_{4}\right]^{2-}$
(b)$\left[\mathrm{Fe}(\mathrm{CO})_{4}\right]^{2-}<\left[\mathrm{Co}(\mathrm{CO})_{4}\right]^{-}<\left[\mathrm{Ni}(\mathrm{CO})_{4}\right]<\left[\mathrm{Cu}(\mathrm{CO})_{4}\right]^{+}$
(c)$\left[\mathrm{Co}(\mathrm{CO})_{4}\right]^{-}<\left[\mathrm{Fe}(\mathrm{CO})_{4}\right]^{2-}<\left[\mathrm{Cu}(\mathrm{CO})_{4}\right]^{+}<\left[\mathrm{Ni}(\mathrm{CO})_{4}\right]$
(d)$\left[\mathrm{Ni}(\mathrm{CO})_{4}\right]<\left[\mathrm{Cu}(\mathrm{CO})_{4}\right]^{+}<\left[\mathrm{Co}(\mathrm{CO})_{4}\right]^{-}<\left[\mathrm{Fe}(\mathrm{CO})_{4}\right]^{2-}$
Answer
Answer (as printed): B
Explanation
No explanation was printed for this question.

Open in whiteboard · Browse this chapter in the app