4‘-bpy (2), bpe (3)) in good yields. The 1H NMR spectra of 2 and 3 indicate that L's are coordinated in a symmetric fashion in these oligomers. The reaction of OsO2(mes)2 with 4,4‘-bpy in CHCl3 followed by slow evaporation afforded the crystalline tetramer [OsO2(mes)2(μ-4,4‘-bpy)]4 (4). The crystal structure of the tetramer 4 contains the square-planar [Os(4,4‘-bpy)]4 core with octahedral local geometry
OsO 2(mes)2(mes = mesityl)与pyz(
吡嗪)的相互作用产生了
吡嗪桥联的二聚体[OsO 2(mes)2 ] 2(μ-pyz)(1),其特征在于X-射线晶体学。Os在1周围的结构是方形
金字塔形,在平面中有
吡嗪,两个
氧代
配体和一个均一基团。Os-O距离和O-Os-O角度分别为1.71Å和147.5°。OsO 2(mes)2与4,4'-bpy(
4,4'-联吡啶)和bpe(反式-1,2-双(4-
吡啶基)
乙烯)在Et 2 O中的反
应得到低聚物[OsO 2(mes)2L] n(L = 4,4'-bpy(2),bpe(3)),收率良好。2和3的1 H NMR光谱表明L在这些低聚物中以对称方式配位。OsO 2(mes)2与4,4'-bpy在CHCl 3中的反应,然后缓慢蒸发,得到晶体四聚体[OsO 2(mes)2(μ-4,4'-bpy)] 4(4)。四聚体4的晶体结构包含方形[Os(4