Comparing the Ligand Behavior of N-Heterocyclic Phosphenium and Nitrosyl Units in Iron and Chromium Complexes
作者:Christoph M. Feil、Thomas D. Hettich、Katharina Beyer、Christina Sondermann、Simon H. Schlindwein、Martin Nieger、Dietrich Gudat
DOI:10.1021/acs.inorgchem.9b00737
日期:2019.5.6
N-Heterocyclic phosphenium (NHP) and nitrosonium (NO+) ligands are often viewed as isolobal analogues that share the capability to switch between different charge states and thus display redox “noninnocent” behavior. We report here on mixed complexes [(NHP)M(CO)n(NO)] (M = Fe, Cr; n = 2, 3), which permit evaluating the donor/acceptor properties of both types of ligands and their interplay in a single complex. The
Masters, A. P.; Parvez, M.; Sorensen, T. S., Canadian Journal of Chemistry, 1993, vol. 71, # 2, p. 230 - 238
作者:Masters, A. P.、Parvez, M.、Sorensen, T. S.、Sun, F.
DOI:——
日期:——
Synthesis, characterization, and reactivity of PPN[Cr(CO)4(NO)]
作者:Daniel R. Mantell、Wayne L. Gladfelter
DOI:10.1016/0022-328x(88)80157-8
日期:1988.6
nitrosyl carbonylmetalate PPN[Cr(CO)4(NO)] has been synthesized from Cr(CO)6 and PPN(NO2) in THF (PPN = bis(triphenylphosphine)iminium cation). The material was characterized by infrared and 15N NMR spectroscopy and by elemental analysis, which demonstrated it has the same structure as Mn(CO)4(NO). Kinetic experiments show the reaction to be first order in both chromium and nitrite with k = 0.25 ± 0.05
新的亚硝酰基羰基金属盐PPN [Cr(CO)4(NO)]是在THF(PPN =双(三苯基膦)亚胺阳离子)中由Cr(CO)6和PPN(NO 2)合成的。通过红外和15 N NMR光谱对元素进行表征,并通过元素分析对其进行表征,证明该材料具有与Mn(CO)4(NO)相同的结构。动力学实验表明,该反应在铬和亚硝酸盐中均为一级反应,在58.60±0.05°C下,k = 0.25±0.05 M -1 sec -1。讨论了与此结果和相关结果一致的机制。PPN [Cr(CO)4(NO)]与亲电试剂(CF 3 SO 3 CH 3,CF 3 SO 3 H,Ph 3 SnCl)。使用不稳定的配合物M(CO)5(THF)(M = Cr,Mo和W),PPN [Cr(CO)4(NO)]生成均-和杂-核配合物PPN [CrM(CO)9(NO)](M = Cr,Mo和W)。
Crystal Structure of [PPN<sup>+</sup>][Cr(CO)<sub>4</sub>NO<sup>-</sup>]: Calculations and Comparisons of Cr(CO)<sub>4</sub>NO<sup>-</sup> with Mn(CO)<sub>5</sub><sup>-</sup>
作者:Ted S. Sorensen、Fang Sun、Robert McDonald
DOI:10.1021/om010201r
日期:2001.8.1
The crystalstructure of the deep red crystalline salt PPN+Cr(CO)4NO- has been determined and can be described as a distorted trigonal bipyramid. As expected, the NO group is equatorial, and the major distortion in Cr(CO)4NO- involves the axial CO groups, with an angle Cax−Cr−Cax of 159.08(17)°. These CO groups form this reduced angle by bending away from the NO group. This distorted structure is not
深红色结晶盐PPN的晶体结构+的Cr(CO)4 NO -已被确定,并且可以被描述为一个扭曲的三角双锥。如所预期的,NO基团是赤道,和以Cr(CO)中的主要失真4 NO -涉及轴向CO基团,具有一个角度C斧-Cr-C斧的159.08(17)°。这些CO基团通过远离NO基团弯曲而形成该减小的角度。这种扭曲结构不是主要由于晶格效应,因为高水平的MO计算表明对于在Cr(CO)类似的几何形状4 NO -通过本身的一部分。这些MO计算还对锰(CO)进行5 -和预期的一样,该阴离子非常易变。与此相反,我们无法找到对Cr(CO)的任何其它低能量几何4 NO - 。