Synthesis and Characterization of Monohaloalkoxyarsoranes Bearing a Novel Tridentate Ligand Occupying One Apical and Two Equatorial Sites
Synthesis and Characterization of Monohaloalkoxyarsoranes Bearing a Novel Tridentate Ligand Occupying One Apical and Two Equatorial Sites
复制标题
具有一个顶端和两个赤道位点的新型三齿配体的单卤代烷氧基胂烷的合成和表征
DOI：
10.1080/10426501003772003
复制
发表时间：
2010
期刊：
影响因子：
--
通讯作者：
and Y. Yamamoto
中科院分区：
文献类型：
--
作者：
H. Yamamichi;S. Matsukawa;and Y. Yamamoto
以2，2，2-三氟-1，1-二苯基乙醇为骨架的三齿刚性配体合成了一系列五价有机砷卤化物（F、Cl和Br）。氯代衍生物（4）由于其对空气的敏感性而不能被分离，而氟代衍生物（5）和溴代衍生物（6）作为结晶固体被分离。5和6的X-射线晶体学表明，这两种化合物在砷原子上采用五配位的砷-卤共价键，而不是四配位的离子形式。5和6位砷原子周围的固态结构几乎是理想的三角双锥（TBP）几何构型。核磁共振结果表明4、5和6在溶液中也处于五配位状态。
A series of pentavalent organoarsenic monohalides (F, Cl, and Br) were synthesized using a rigid tridentate ligand with a 2,2,2-trifluoro-1,1-diphenylethanol skeleton. The chloro derivative (4) could not be isolated due to its sensitivity to air, whereas the fluoro (5) and bromo derivatives (6) were isolated as crystalline solids. The X-ray crystallography of5and6revealed that both compounds adopted a pentacoordination at the arsenic atom with a covalent arsenic-halogen bond rather than the tetracoordinated ionic form. The solid state structures around the arsenic atom of5and6were almost ideal trigonal bipyramidal (TBP) geometries. The NMR measurements implied that4,5, and6were in the pentacoordinated state even in solution.