Trinuclear iridium and rhodium complexes: the solution to a puzzle involving the multiple coordination possibilities of 1,8-naphthyridine-2-one ligands
作者:B.Eva Villaroya、Luis A. Oro、Fernando J. Lahoz、Andrew J. Edwards、Miguel A. Ciriano、Pablo J. Alonso、Antonio Tiripicchio、Marisa Titipicchio Camellini
DOI:10.1016/s0020-1693(96)05234-6
日期:1996.9
to be intermediates in the synthesis of the trinuclear complexes [M3(μ3-OMe2napy)2(CO)2(cod)2]+ M = Rh (8), Ir (9). Reactions of [IrCl(CO)2(NH2-p-tolyl] with the complexes [Rh(μ-OR2napy)(diolefin)]n followed by addition of a poor donor anion is a general one-pot synthesis for the hetertrinuclear complexes [Rh2Ir(μ3-OR2napy)2(CO)2(diolefin)2]+ (RMe, diolefin = cod (10), tetrafluorobenzo-barrelene (tfbb)
摘要1,8-萘啶-2-酮(HOnapy)和5,7-二甲基-1,8-萘啶-2-酮(HOMe2napy)配体的多重配位可能性允许合成各种三-二-和-单核复合物,表现出通量行为和协调的ML2片段的频繁交换。因此,[M2(μ-OMe)2(cod)2](cod = 1,5-环辛二烯)与HOnapy和HOMe2napy的反应生成通式为[M(μ-OR2napy)(cod)] n的化合物M = Ir,R = Me(1a,1b,H(2); M = Rh,R = Me(3a,3b)。它们结晶成不可逆的黄色(a)和紫色/橙色(b)形式,并且还显示出a溶液中令人费解的行为。两种形式(3a,3b)和光谱数据的X射线衍射研究均表明,黄色形式为单核络合物,而深色晶体则包含双核络合物。配合物的核数取决于溶剂。另外,两种类型的络合物都是流动的。混合配体配合物[M2(μ-OMe2napy)2(CO)2(cod)] M = I