The correct order of vNO (cm⁻¹) in the following compound is · ABC26IN0758
Subject: Inorganic Chemistry · Chapter: Organometallic Compounds · Topic: Organometallics – General · Exam: JAM 2005-2022 · Marks: 2 · Difficulty: Hard
The correct order of $v_{\mathrm{NO}}\left(\mathrm{cm}^{-1}\right)$ in the following compound is
(a)$\mathrm{NO}^{+}>\mathrm{NO}>[\mathrm{NiCp}(\mathrm{NO})]>\left[\mathrm{Cr}(\mathrm{Cp})_{2}(\mathrm{NO})_{4}\right]$
(b)$\left[\mathrm{Cr}(\mathrm{Cp})_{2}(\mathrm{NO})_{4}\right]>[\mathrm{NiCp}(\mathrm{NO})]>\mathrm{NO}^{+}>\mathrm{NO}$
(c)$\mathrm{NO}^{+}>\left[\mathrm{Cr}(\mathrm{Cp})_{2}(\mathrm{NO})_{4}\right]>\mathrm{NO}>[\mathrm{NiCp}(\mathrm{NO})]$
(d)$[\mathrm{NiCp}(\mathrm{NO})]>\mathrm{NO}>\left[\mathrm{Cr}(\mathrm{Cp})_{2}(\mathrm{NO})_{4}\right]>\mathrm{NO}^{+}$
Answer
Answer: A ✓ checked by 4AB · confidence high
Explanation
ν(NO): NO⁺ (~2300) > NO (1876) > terminal linear NO in CpNi(NO) > bridging NO in [CpCr(NO)₂]₂ (a).
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