含氮多羧酸钴(Ⅱ)-钕(Ⅲ)异核配合物合成和晶体结构

Syntheses and Structures of Polynuclear Complexes with Aminopolycarboxylic Acid-bridge

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。

The complex[NdCo （NTA）2 （H2O）lws （CHaOH）1/3]·（CHaOH）2/3·10/3H2O（1） was obtained by the diffusion between two kinds of reactions. It crystallizes in triclinic space group PT with cell parameters a=0. 963 6（2） nm,b=1. 044 9（2） nm,c=l. 339 3（2） nm,a=107.04°,β=98.25（2）°,γ=103.98o, V= 1. 217 2（4） nma,Z= 2. The complex exhibits a 3-D network structure. The complex [Nd2Co3（EDTA）a（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=l. 474 1（2） nm,β=ll6. 407（2）°,V=3. 081 3（8） nm3,Z=2. Each Nd3＋ is connected to three Co2＋ through three carboxylate bridges,while each Coa＋ has two Nda ~ neighbors. In this way,a twelve-member cycle is produced and connected to each other to form a two-dimension net work sheet. These sheets are further linked into a three-dimensional network by the water molecules between the layers through rich hydrogen bonds.