The approximate positions of νco bands (cm⁻¹) in the solid-state infrared spectrum and the Fe-Fe bond order… · ABC26IN0258
Subject: Inorganic Chemistry · Chapter: Organometallic Compounds · Topic: Organometallic Compounds – General · Exam: CSIR NET 2015 · Marks: 2 · Difficulty: Hard
The approximate positions of $\nu_{\mathrm{co}}$ bands ($\mathrm{cm^{-1}}$) in the solid-state infrared spectrum and the Fe-Fe bond order in $\mathrm{[Fe(\eta^5\text{-}C_5H_5)(\mu\text{-}CO)(CO)]_2}$ (non-centrosymmetric) respectively, are
(a)(2020, 1980, 1800) and one
(b)(2020, 1980, 1800) and two
(c)(2020, 1980) and one
(d)(2143) and one
Answer
Answer (as printed): A
Explanation
-1 Terminal CO=2120-1850 cm -1 µ2 CO=1850-1750 cm 2 In this complex M-M bond order = 1 and two types of CO's terminal as well as -bridging. So, νco band lies in both range. [CSIR-JUNE 2016]
Explanation as extracted from the printed page; notation may be imperfect.