Crystal structures of [W(CO)5(PPh3)], [M(CO)5(AsPh3)] and [M(CO)5(SbPh3)](M = Mo or W): a comparative study of structure and bonding in [M(CO)5(EPh3)] complexes (E = P, as or Sb; M = Cr, Mo or W)
作者:Manuel J. Aroney、Irmi E. Buys、Murray S. Davies、Trevor W. Hambley
DOI:10.1039/dt9940002827
日期:——
Crystal structures have been determined for [W(CO)5(PPh3)], [M(CO)5(AsPh3)] and [M(CO)5-(SbPh3)](M = Mo or W) as part of a systematic study of a series of nine [M(CO)5(EPh3)] complexes (M = Cr, Mo or W; E = P, As or Sb). Trends in bond lengths and angles are rationalised in terms of steric and electronic interactions between the bonded M(CO)5 and EPh3 fragments. Comparison is made between the solid-state
确定了[W(CO)5(PPh 3)],[M(CO)5(AsPh 3)]和[M(CO)5-(SbPh 3)](M = Mo或W)的晶体结构,系统研究九种[M(CO)5(EPh 3)]配合物(M = Cr,Mo或W; E = P,As或Sb)的一部分。结合长度和角度的趋势根据结合的M(CO)5和EPh 3片段之间的空间和电子相互作用而合理化。比较自由的和配位的EPh 3的固态几何形状。扭转角定义了EPh 3组相对于M(CO)的布置图5显示在[M(CO) 5(EPh 3)]系列内几乎没有变化。对于所有九个复合体,EPh 3组的螺旋桨几何形状与对称C 3结构的偏差都很小。研究扩展到包括其他相关的[M(CO) 5 L]复合物。29种这类化合物的结构参数趋势与配体L的空间行为和π受体容量有关。研究表明,配体L中磷原子的杂化变化不能充分解释M–P键的大小。