Inorganic Chemistry, Vol.54, No.19, 9384-9386, 2015
Phosphine Control of the Oxidative Addition Chemistry of Tetrathiocins to Palladium(0): Characterization of Mono-, Di-, and Hexanuclear Palladium(II) Dithiolate Complexes
The outcome of the oxidative addition reactions of bis(4',5'-dimethoxybenzo)-1,2,5,6-tetrathiocin to Pd(2)dba(3) under microwave conditions is sensitive to the nature of the phosphine coreagent; the bidentate phosphines dppm, dppe, and dppf afford the mononuclear dithiolates (dmobdt)Pd(dppm) (4), (dmobdt)Pd(dppe) (2), and (dmobdt)Pd(dppf) (5), whereas more labile monodentate phosphines lead to aggregation; Ph3P afforded the dinuclear dithiolate (dmobdt)(2)Pd-2(PPh3)(2) (6), whereas (Bu3P)-Bu-t generated the phosphine-free hexanudear edge-capped octahedral complex Pd-6(dmobdt)(6) (7) [dmobdt = 4,5-dimethoxybenzenedithiolate, (MeO)(2)C6H2S22-].