双-(磷酸二甲酯)合铜的红外光谱与晶体结构

合成了单元化学式为-Cu[(CH_3O)_2PO_2]_2-的铜(Ⅱ)与磷酸二甲酯的配位聚合物。测定了4000—100 cm~(-1)谱区内的红外光谱, 讨论了某些谱带的归属, 解释了配位化合物形成后的光谱变化。由单晶X-射线衍射法确定此配合物的晶体属单斜晶系,空间群为P2_1/c, 晶胞参数a=1.0704(4), b=0.5093(2), c=1.9737(6) nm; β=96.23(3)°; V=1.0696(6) nm~3; Z=4. M=313.5, F(000)=636e, D_c=1.943 g·cm~(-3)。铜与五个配体中的五个非酯氧配位成四角锥体, 相邻两铜原子以对称的“O—P—O”桥和不对你的“O—P—O”桥相连, 形成一维链状配位聚合物。

INFRARED SPECTRA AND CRYSTAL STRUCTURE OF BIS-(DIMETHOXYLPHOSPHATO)COPPER

The title complex has been synthesized by the reaction of CuCl_2 with trimethyl phosphate. Its Infrared spectra from 4000 to 100 cm~(-1) were measured. The assignment of some absorption bands was discussed. It is found that the stretching vibrations of bridge groups O—P—O are divided into two groups according to tbeir bond length. The crystal structure of the complex has been determined from single crystal X-ray diffraction data. The crystals belong to monoclinic system, space group P2_1/c with cell parameters: a=1.0704(4), b=0.5093(2), c=1.9737(6) nm; β=96.23(3)°; V=1.0696(6) nm~3; Z=4, final R=0.044. Copper ion is coordinated to five nonester oxygen atoms to form a distorted square pyramid. The adjacent copper ions are connected by symmetric and non-symmetric bridge groups of O—P—O, forming an infinite one-dimensional chain coordination polymer.