Ligand Design for Heterobimetallic Single-Chain Magnets: Synthesis, Crystal Structures, and Magnetic Properties of MIICuII (M=Mn, Co) Chains with Sterically Hindered Methyl-Substituted Phenyloxamate Bridging Ligands
作者:Emilio Pardo、Rafael Ruiz-García、Francesc Lloret、Juan Faus、Miguel Julve、Yves Journaux、Miguel A. Novak、Fernando S. Delgado、Catalina Ruiz-Pérez
DOI:10.1002/chem.200600992
日期:2007.2.23
oxamato-bridged heterobimetallic chains of general formula [MCu(L(x))(2)] m DMSO (m=0-4) (L(1)=N-2-methylphenyloxamate, M=Mn (1 a) and Co (1 b); L(2)=N-2,6-dimethylphenyloxamate, M=Mn (2 a) and Co (2 b); L(3)=N-2,4,6-trimethylphenyloxamate, M=Mn (3 a) and Co (3 b)) have been prepared by reaction between the corresponding anionic oxamatocopper(II) complexes [Cu(Lx)2](2-) with Mn(2+) or Co(2+) cations in
通式[MCu(L(x))(2)] m DMSO的两个新系列中性草酰胺桥杂双金属链m DMSO(m = 0-4)(L(1)= N-2-甲基苯基草酸酯,M = Mn( 1a)和Co(1 b); L(2)= N-2,6-二甲基苯基草酸酯,M = Mn(2 a)和Co(2 b); L(3)= N-2,4,6-三甲基苯基草酸酯,M = Mn(3 a)和Co(3 b))是通过相应的阴离子草酸酯铜(II)配合物[Cu(Lx)2](2-)与Mn(2+)或Co( DMSO中的2+)阳离子。[CoCu(L2)2(H2O)2](2 b')和[CoCu(L3)2(H2O)2] 4 H2O(3b')的晶体结构已通过单晶X射线衍射解析方法。化合物2b'和3b'分别采用之字形和线性链结构。通过草酸盐桥的链内Cu ... Co距离为2296'中的5.296(1)A和3b'中为5.301(2)A,而链中Co ... Co的最短距离为5。2