化学学报 ›› 2001, Vol. 59 ›› Issue (2): 201-206. 上一篇    下一篇

研究论文

含吡唑配体的VIB金属羰基配合物的合成与电化学性质研究

贾文利;唐良富;柴建方;王志宏;王积涛   

  1. 南开大学化学系元素有机化学国家重点实验室
  • 发布日期:2001-02-15

Synthesis and electrochemical properties of pentacarbonylchromium and tungsten complexes containing pyrazole ligands

Jia Wenli;Tang Liangfu;Chai Jianfang;Wang Zhihong;Wang Jitao   

  • Published:2001-02-15

研究了吡唑类配体与M(CO)6(M=Cr,W)的光化学反应,合成了一系列的含吡唑配体的五羰基铬钨配合物。研究了该类化合物的电化学性质。结果表明:铬系列化合物存在一对准可逆的氧化还原峰,而钨系列化合物只存在一个不可逆的氧化峰,用X射线单晶衍射测定了化合物3,4,5-三甲基吡唑五羰基铬的晶体结构。该晶体为单斜晶系,空间群为P2(1)/m,晶胞参数为a=0.9106(3)nm,b=07627(2)nm,c=0.9637(3)nm,β=91.855(5)°,V=0.6689(3)nm^3,Z=2,R=0.042,Cr为六配位的变形八面体构型。

关键词: 吡唑P, 羰基铬, 羰基钨, 铬络合物, 钨络合物, 光化学, 羰基络合物, 电化学, 晶体结构, 循环伏安法

A series of carbonylchromium and tungsten complexes containing pyrazole ligands [M(CO)5L] has been synthesized by the photochemical reactions of pyrazole ligands with M(CO)6(M=Cr or W). Their electrochemical behaviors have also been investigated by cyclic voltammetry, indicating that the chromium complexes exhibit one reversible or quasi - reversible couple corresponding to a one - electron oxidation, but the tungsten complexes have one irreversible oxidation process. The crystal structure of Cr (CO)5L(L represents 3, 4,5-trimethylpyrazole) was determined by X-ray diffraction method, which is monoclinic, space group P2(1)/m with unit cell parameters a=0.9106(3) nm, b=07627(2) nm, c=0.9637(3) nm, β=91.855(5)°, V=0. 6689(3) nm^3, Z=2, R=0.042. The central metal of Cr is six- coordinated with a quasi - octahedral coordination geometry.

Key words: PYRAZOLE P, CHROMIUM CARBONYL, CHROMIUM COMPLEX, TUNGSTEN COMPLEX, PHOTOCHEMISTRY, CARBONYL COMPLEX, ELECTROCHEMISTRY, CRYSTAL STRUCTURE, CYCLOVOLTAMGRAPH

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