Methyl-Bridged Transition Metal Complexes (M = Cr−Fe) Supported by Bulky Terphenyl Ligands
Methyl-Bridged Transition Metal Complexes (M = Cr−Fe) Supported by Bulky Terphenyl Ligands
复制标题
大体积三联苯配体支持的甲基桥过渡金属配合物 (M = Cr−Fe)
DOI：
10.1021/om900724p
复制
发表时间：
2009
期刊：
影响因子：
2.8
通讯作者：
P. Power
中科院分区：
文献类型：
--
作者：
Chengbao Ni;P. Power
二价三联苯过渡金属甲基配合物{ArM（μ-Me）}2的合成与表征（M = Cr（1），Ar = C6H-2，6-（C6 H2 - 2，4，6-iPr 3）2- 3，5-iPr 2，缩写为3，5-iPr 2-Ar*; M = Mn（2），Fe（3），Ar = C_6H_3 - 2，6-（C_6H_2 - 2，4，6-iPr_3）_2，简称Ar ~*）和苯基桥联铁配合物{Ar ~*Fe（μ-Ph）}_2（4）。配合物1 - 4是由相应的三联苯金属卤化物与LiMe或LiPh反应制备的，具有二聚体结构，其中三配位金属由甲基或苯基桥接。1中的每个铬原子都具有与侧翼芳环的同位碳进一步相互作用的特征;而2和3中的锰和铁原子具有扭曲的三角平面几何形状。配合物1−4是甲基或苯基的低配位过渡金属配合物的罕见例子，它们通过X射线晶体学、NMR和UV−维斯光谱、元素分析和磁性测量进行了表征。
The synthesis and characterization of a series of divalent terphenyl transition metal methyl complexes {ArM(μ-Me)}2 (M = Cr (1), Ar = C6H-2,6-(C6H2-2,4,6-iPr3)2-3,5-iPr2, abbreviated as 3,5-iPr2-Ar*; M = Mn (2), Fe (3), Ar = C6H3-2,6-(C6H2-2,4,6-iPr3)2, abbreviated as Ar*) as well as a phenyl-bridged iron complex {Ar*Fe(μ-Ph)}2 (4) are described. Complexes 1−4 were prepared by reaction of the corresponding terphenyl metal halide with LiMe or LiPh and have dimeric structures, in which three-coordinate metals are bridged by methyl or phenyl groups. Each chromium atom in 1 features a further interaction with the ipso-carbon of the flanking aryl ring; while the manganese and iron atoms in 2 and 3 have distorted trigonal-planar geometry. Complexes 1−4 are rare examples of low-coordinate transition metal complexes of methyl or phenyl groups, and they were characterized by X-ray crystallography, NMR, and UV−vis spectroscopy, elemental analysis, and magnetic measurements.