The number of bridging ligand(s) and metal-metal bond(s) present in the complex $\left[\mathrm{Ru}_{2}(\eta^{5}\text{-}\mathrm{Cp})_{2}(\mathrm{CO})_{2}(\mathrm{Ph}_{2}\mathrm{PCH}_{2}\mathrm{PPh}_{2})\right]$ (obeys 18-electron rule), respectively, are
(a)0 and 1
(b)2 and 1
(c)3 and 1
(d)1 and 2
Answer
Answer: C ✓ checked by 4AB · confidence high
Explanation
[Ru₂Cp₂(μ-CO)₂(μ-dppm)]: three bridging ligands (two CO and the dppm), and the count (16 + 10 + 4 + 4 = 34 for two metals) requires one Ru–Ru bond.