Syntheses and X-ray Structures of (2,2‘-Biphosphinine)-(η⁵-pentamethylcyclopentadienyl)ruthenium(I) Dimer and Ruthenium(0) Complexes

Reduction of the [Ru(Cp*)(tmbp)Cl] complex (tmbp = 4,4‘,5,5‘-tetramethyl-2,2‘-biphosphinine) with 1 and 2 equiv of sodium naphthalenide respectively yield a dimeric [Ru(Cp*)(tmbp)]2 complex and a [Ru(Cp*)(tmbp)][Na(DME)2] complex which were both structurally characterized. Trapping the Ru(0) complex with MeI, Ph3SnCl, Me3SnCl, or H+ affords the corresponding Ru(II) derivatives.