Q47 · CSIR-NET Chemistry, June 2018
Paper: CSIR-NET June 2018 · Subject: Inorganic Chemistry · Chapter: Organometallic Compounds · Topic: Cluster Compounds Wade Rules · Marks: 2 · Difficulty: Hard
For the following reaction 
$+\ ^{13}\mathrm{CO} \rightarrow$ 
The structure of the intermediate is
$+\ ^{13}\mathrm{CO} \rightarrow$ The structure of the intermediate is(c)
(d)
Answer
Answer: D ✓ checked by 4AB · confidence high
Explanation
Migratory insertion of CH₃ onto CO gives the 16-electron acyl CpFe(CO)(C(O)CH₃), which then takes up ¹³CO. The ¹³C label is therefore on a terminal CO, not in the acyl (d).
Study loop for Organometallic Compounds