含氮多羧酸钴(Ⅱ)-钕(Ⅲ)异核配合物合成和晶体结构

用扩散法合成了配合物NdCo(NTA)2(H2O)11/3(CH3OH)1/3]·(CH3OH)2/3.10/3H2O(1),晶体属三斜晶系,空间群为P1,晶胞参数为a=0.963 6(2)nm,b=1.044 9(2)nm,c=1.339 3(2)nm,α=107.04°,β=98.25(2)°,γ=103.98°,V=1.217 2(4)nm3,Z=2,配合物具有三维网络结构。配合物Nd2Co3(EDTA)3(H2O)11·12H2O](2)用水热法获得,属单斜晶系,空间群为C2,晶胞参数为a=1.592 5(3)nm,b=1.465 5(2)nm,c=1.474 1(2)nm,β=116.407(2)°,V=3.081 3(8)nm3,Z=2。每个Nd3+通过羧基桥联3个Co2+,而每个Co2+与两个相邻Nd3+连接构成12员环从而形成二维杂金属层,相邻层之间通过水的氢键作用连接形成三维结构。

Syntheses and Structures of Polynuclear Complexes with Aminopolycarboxylic Acid-bridge

The complexNdCo(NTA)2(H2O)11/3(CH3OH)1/3]·(CH3OH)2/3·10/3H2O(1) was obtained by the diffusion between two kinds of reactions.It crystallizes in triclinic space group P1 with cell parameters a=0.963 6(2) nm,b=1.044 9(2) nm,c=1.339 3(2) nm,α=107.04°,β=98.25(2)°,γ=103.98°,V=1.217 2(4) nm3,Z=2.The complex exhibits a 3-D network structure.The complex Nd2Co3(EDTA)3(H2O)11·12H2O](2) crystallizes in monoclinic space group C2 with cell parameters a=1.592 5(3) nm,b=1.465 5(2) nm,c=1.474 1(2) nm,β=116.407(2)°,V=3.081 3(8) nm3,Z=2.Each Nd3+ is connected to three Co2+ through three carboxylate bridges,while each Co2+ has two Nd3+ neighbors.In this way,a twelve-member cycle is produced and connected to each other to form a two-dimension network sheet.These sheets are further linked into a three-dimensional network by the water molecules between the layers through rich hydrogen bonds.