Ruthenium and rhodium nitrosyl complexes containing dichalcogenoimidodiphosphinate ligands

Interaction of [Ru(NO)Cl3(PPh3)2] or Ru(NO)Cl3 · xH2O with K[N(R2PQ)2] afforded trans-[Ru(NO)(Cl){N(R2PS)2}2] (R = Ph, Pri) or cis-[Ru(NO)(Cl){N(Ph2PO)2}] whereas that with K[N(Ph2PSe)2] led to a mixture of trans-[Ru(NO)Cl{N(Ph2PSe)2}2] and trans-[Ru(NO)Cl{N(Ph2PSe)2}{Ph2P(Se)NPPh2}]. Treatment of [Rh(NO)Cl2(PPh3)2] with K[N(R2PQ)2] gave [Rh(NO){N(R2PSQ)2}2] (R = Ph or Pri, Q = S or Se), in which the nitrosyl ligand is bent.