Paper: CSIR-NET June 2018 · Subject: Inorganic Chemistry · Chapter: Organometallic Compounds · Topic: Organometallic Compounds – General · Marks: 2 · Difficulty: Medium
Identify the pair of molecules which are isoelecronic as well as isostructural from the following $\left[\mathrm{Pd}\left(\mathrm{PPh}_{3}\right)_{4}\right](\mathrm{A}),\left[\mathrm{V}(\mathrm{CO})_{6}\right](\mathrm{B}),\left[\mathrm{Cr}(\mathrm{CO})_{6}\right](\mathrm{C}),\left[\mathrm{Rh}\left(\mathrm{PPh}_{3}\right)_{3} \mathrm{Cl}\right](\mathrm{D}),\left[\left(\eta^{5}-\mathrm{C}_{5} \mathrm{H}_{5}\right) \mathrm{Ni}(\mathrm{NO})\right](\mathrm{E}), \mathrm{Ni}(\mathrm{CO})_{4}(\mathrm{F})$
(a)B and C
(b)A and F
(c)A and D
(d)C and E
Answer
Answer: B ✓ checked by 4AB · confidence high
Explanation
[Pd(PPh₃)₄] and Ni(CO)₄ are both 18-electron d¹⁰ ML₄ tetrahedral complexes. [V(CO)₆] is 17-electron, [Rh(PPh₃)₃Cl] 16-electron square planar.