【摘要】 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 .910 6( 3 )nm ,b =0 .762 7( 2 )nm ,c =0 .963 7( 3 )nm ,β =91.85 5 ( 5 )°,V =0 .6689( 3 )nm3,Z =2 ,R =0 .0 42 .Cr为六配位的变形八面体构型更多还原

【Abstract】 A series of carbonylchromium and tungsten complexes containing pyrazole ligands 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=0.7627（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.更多还原