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(中国地质大学地质实验室, 北京100083) 报道了一个草酰胺桥连的四核Cu(II)Mn(II)配合物[Mn(CuL)3][Mn(H2O)6][N(CN)2]2(ClO4)2 4H2O (L为1,4,8,11-四氮杂环十四烷-2,3-二酮) (C34H74Cl2Cu3Mn2N18O24, Mr = 1490.51)的合成、晶体结构和磁性。配合物属于单斜晶系, 空间群为C2/c, 晶胞参数如下:a = 22.295(5), b = 12.852(3), c = 20.109(4) , = 90.47(3), V = 5762(2) 3, Dc = 1.718 g/m3, Z = 4, F(000) = 3068, m = 1.701mm-1, R = 0.0915, wR = 0.1810 (based on F2)。3个中性Cu(II)大环配合物通过6个氧原子与Mn(II)配位, MnO键长范围为2.190(6)~2.208(5) 拧Mn(CuL)3]2+通过高氯酸根离子连接起来形成一个二维层。高氯酸根的氧原子与CuII键长范围为2.902~2.996 , 为弱相互作用。[Mn(H2O)6]2+, N(CN)2-和H2O位于层间, 并通过氢键连成三维网络结构。磁性研究表明CuII-MnII离子间通过草酰胺传递反铁磁相互作用, 用基于各向同性的Hamiltonian算符u001f = 2JMnCuu001fMn(u001fCu1 + u001fCu2 + u001fCu3)进行磁性拟合得到磁耦合常数JCuMn =-17 cm-1。
(Geological Laboratory, China University of Geosciences, Beijing 100083) An oxalamide bridged tetranuclear Cu (II) Mn (II) complex [Mn (CuL) 3] 2] 2 (ClO4) 2 4H2O (L is 1,4,8,11-tetraazacyclotetradecane-2,3-dione) (C34H74Cl2Cu3Mn2N18O24, Mr = 1490.51). The crystal structure and magnetism were also studied. The complex belongs to the monoclinic system with a space group of C2 / c with unit cell parameters of a = 22.295 (5), b = 12.852 (3), c = 20.109 (4), = 90.47 (3), V = 5762 (2) 3, Dc = 1.718 g / m3, Z = 4, F (000) = 3068, m = 1.701 mm-1, R = 0.0915, wR = 0.1810 (based on F2). Three neutral Cu (II) macrocycles were coordinated to Mn (II) via six oxygen atoms and the MnO bond length ranged from 2.190 (6) to 2.208 Perchlorate ions join to form a two-dimensional layer. Perchlorate oxygen atoms and CuII bond length range of 2.902 ~ 2.996, for the weak interaction. [Mn (H2O) 6] 2+, N (CN) 2- and H2O are located in the interlayer and connected to the three-dimensional network by hydrogen bonding. Magnetic studies show that the CuII-MnII ions transfer antiferromagnetic interaction through oxalamide, and the magnetic coupling is obtained by using the Hamiltonian operator based on the isotropic Hamiltonian operator (u001fCu1 + u001fCu2 + u001fCu3) Constant JCuMn = -17 cm-1.