Monomeric and dimeric ruthenium thiooxalate complexes: Structures of CpRu(PPh3)2SCOCO2Me and CpRu(dppe)SCOCO2Et

The complexes CpRu(L)(L′)SH react with O-alkyl oxalyl chlorides to form the corresponding O-alkylthiooxalate complexes CpRu(L)(L′)SCOCO2R (L = L′ = PPh3 (1), 12dppe (2); L = PPh3, L′ = CO (3); R = Me (a), Et (b)). The reactions of the hydrosulfido complexes with half equivalent of oxalyl chloride produce [CpRu(L)(L′)SCO]2 (L = L′ = PPh3 (4), 12dppe (5); L = PPh3, L′ = CO (6)). The crystal structures of CpRu(PPh3)2SCOCO2Me (1a) and CpRu(dppe)SCOCO2Et (2b) are reported.