phosphine sulfides. They lead to mixtures of binuclear mono- and dichalcogenide complexes [(Sm(dippForm)2)2(µ-En)] (E = S (2), Se (3); n = 1, 2). The ratio of species with (µ-E) or (µ-η2:η2-E2) bridges depends on the nature of the chalcogenide reactant and its concentration, but even under its local excess the formation of the monochalcogenide is preferential. Both types of species form isostructural solid
庞大的 Sm II
甲脒络合物 [Sm( dipp Form) 2 (thf) 2 ] ( dipp Form - = HC(Ndipp) 2 - , dipp = 2,6-二异丙基苯基; thf =
四氢呋喃) ( 1 )的还原作用已经研究了一系列
磷化氢硫属化物(R 3 PE = Ph 3 PO、Ph 3 PS、Ph 3 PSe、n Bu 3 PS、n Bu 3 PSe)以及Ph 3 AsS。E = Se 的膦衍
生物和 Ph 3的反应速度很快AsS,慢为
硫化膦。它们导致双核单和二
硫属化物配合物 [(Sm( dipp Form) 2 ) 2 (µ-E n )] (E = S ( 2 ), Se ( 3 ); n = 1, 2) 的混合物。具有 (μ-E) 或 (μ-η 2 :η 2 -E 2 ) 桥的物质的比例取决于
硫属化物反应物的性质及其浓度,但即使在其局部过量的情况下,单
硫属化物的形