Stepwise selenium transfer from tertiary phosphineselenides to [Ru3(CO)12]. Structural characterization of the primary product [Ru3(μ3-Se)(μ3-CO)(CO)7(PPh3)2]

Abstract

The monoselenido clusters [Ru₃(μ₃-Se)(μ₃-CO)(CO)₇(PR′R₂)₂] (R = Ph, R′ = Ph or CH₂Ph; R = R′ = p-C₆H₄OMe) obtained by the reaction of phosphine selenides R₂R′PSe with [Ru₃(CO)₁₂], undergo the second attack by R₂R′PSe affording, under appropriate conditions, the corresponding diselenido derivative [Ru₃(μ₃-Se)₂(CO)₇(PR′R₂)₂]. The crystal structure of [Ru₃(μ₃-Se)(μ₃-CO)(CO)₇(PPh₃)₂] 4 showing the first triruthenium triangle bicapped by a selenium atom and a carbonyl ligand, is also reported.