Solution and solid-state complexes of the potentially tetradentate pyridyl-thiazole ligand 6,6′-bis(4-methylthiazol-2-yl)-2,2′-bipyridine with CoII, NiII, CuII, CdII, HgII, CuI and AgI
作者:Thomas Riis-Johannessen、John C. Jeffery、Alex P.H. Robson、Craig R. Rice、Lindsay P. Harding
DOI:10.1016/j.ica.2005.03.002
日期:2005.6
with the transition metal dications CoII, NiII, CuII, CdII and HgII results in the formation of mononuclear [M(L1)]2+ complexes, in which a planar ligand coordinates to the metals via all four N-donors. In contrast, reaction of L1 with CuI and AgI monocations, affords dinuclear double stranded helicate species [M2(L1)2]2+ (where M = CuI or AgI), in which partitioning of the ligand into two bis-bidentate
潜在的四齿N供体配体6,6'-双(4-甲基噻唑-2-基)-2,2'-联吡啶(L1)与过渡金属离子CoII,NiII,CuII,CdII和HgII的反应导致形成单核[M(L1)] 2+配合物,其中平面配体通过所有四个N-供体与金属配位。相反,L1与CuI和AgI单阳离子反应,得到双核双链螺旋物种[M2(L1)2] 2+(其中M = CuI或AgI),其中配体分配为两个双双齿吡啶基-噻唑螯合单元允许每个配体桥接两个金属中心。X射线晶体学,电喷雾质谱和NMR光谱表明,当M = CoII,NiII,CuII,CdII和HgII时,[Mn(L1)m] z +(其中n = 1,m = 1和z = 2)的配合物。 n = 2,m = 2,z = 2,当M = CuI时),将其固态结构保留在溶液中。相反,尽管1 H NMR研究表明等摩尔量的Ag(X)(其中)和L1(在硝基甲烷或乙腈中)的结合会导致溶液中形