| Abstract | Thermolysis of [Ru₃(CO)₁₀(Ph₂PC≡CBut)₂] (1a) gives the 48-e cluster [Ru₃(μ-η¹,η²-C≡CBut)₂(μ-PPh₂)₂(CO)₆] (4), which readily adds CO or PPh₃ to give the corresponding 50-e clusters [Ru₃(μ-η¹,η²-C≡CBut)₂(μ-PPh₂)₂(CO)₆(L)] (L = CO, 5a, PPh₃, 6) while thermolysis of [Ru₃(CO)₁₀(Ph2PC≡CPh)(Ph₂PC≡CR)] (R = Ph, 1b; But 1c) affords 50-e [Ru₃(μ-PPh₂)(μ-η¹,η²-C≡CPh)(μ-η¹,η2-C≡CR)(CO)₇] (5b, 5c) directly, which convert smoothly to the 48-e diyne clusters [Ru₃(μ-η²-PhC₂C≡CR)(μ-PPh₂)₂(CO)₇] (7b, 7c). In the case of [Ru3(CO)₁₀(Ph₂PC≡CPh)₂] the compound {Ru₂[η¹,η¹ : η²,η²-PhCC(PPh₂)CCPh](CO)5}(μ-PPh₂)[Ru(CO)₃] (8) is also obtained. |
|---|
