Ring reversal, sulphur inversion, and 1,3-metal shifts in sulphur-containing six-membered-ring complexes of chromium and tungsten carbonyls
作者:Edward W. Abel、Martin Booth、Keith G. Orrell、Graham M. Pring
DOI:10.1039/dt9810001944
日期:——
six-membered ligand ringreversal, pyramidal sulphur-atom inversion, and commutation of an M(CO)5 moiety over three sulphur atoms via a 1,3-shift process. Accurate energy barriers (ΔG‡) for all three processes have been calculated. It is interesting to note that only the β-[graphic omitted]HMe complexes undergo the 1,3-shift process at ambient temperature.
已经制备并研究了通式为[M(CO)5 L](M = Cr或W; L = [省略图形] H 2,[省略图形] H 2和β-省略图形HME)的配合物。1 H nmr变温光谱仪。静态和动态光谱的详细计算机合成表明,络合物以多种构象存在,这些构象通过通量过程相互转换。这些过程是六元配体环反转,金字塔型硫原子反转和通过1,3-移位过程将M(CO)5部分换成三个硫原子。准确的能垒(ΔG ‡),所有三个过程均已计算出。有趣的是,在环境温度下,只有β-[H]的HME配合物经历了1,3-移位过程。
π-Arene complexes
作者:Simon Lotz、Minet Schindehutte、Marthie M. van Dyk、Jan L.M. Dillen、Petrus H. van Rooyen
DOI:10.1016/0022-328x(85)88072-4
日期:1985.11
A carbonyl ligand of π-arenetricarbonylchromiun(0) complexes is photochemically displaced to give π-arenedicarbonyl complexes of chromium(0) with thio-ether ligands. In contrast, irradiation of π-arenetricarbonylchromium compounds with dithio-ester and trithiocarbonate ligands yields only pentacarbonyl complexes. Substitution of the π-arene ring, the thio-ether ligand, or both, is easily achieved at
Sulphur-containing metal complexes. Part 4. Preparation of fac-tri-substituted carbonyl complexes of chromium(0) and tungsten(0) containing a phosphine, phosphite, or isocyanide ligand in addition to a chelate ring with carbene carbon and sulphur donor atoms
作者:Helgard G. Raubenheimer、Simon Lotz、Hester E. Swanepoel、Hendrik W. Viljoen、Johanna C. Rautenbach
DOI:10.1039/dt9790001701
日期:——
The reaction of LiBu with pentacarbonyl(thioether) complexes of chromium and tungsten [M(CO)5S(CH2R2)R1], in the presence of or prior to the addition of a π-acid ligand L, followed by alkylation, produces a series of tri-substituted carbonylcomplexes of the type fac-[[graphic omitted]R1)R2}]. A proposed mechanism involving a double consecutive carbonylation is substantiated by the formation of a
2,2-Dithiocarboxylation of a chromium co-ordinated 1,3 dithian. X-Ray crystal structure of fac-tricarbonyl(diethyl 1,3-dithian-2,2-bisdithiocarboxylate)chromium
作者:Helgard G. Raubenheimer、Johanna C. Viljoen、Simon Lotz、Anthonie Lombard、Gert Kruger
DOI:10.1039/c39810000749
日期:——
Reaction of [Cr(CO)5[graphic omitted]H2}] with BuLi and CS2(–100°C) followed by alkylation gives the title compound (1), the structure of which has been determined by X-ray crystallography and in which the two preferentially co-ordianated thioketonic sulphur atmos exercise a considerable trans influence compared with the sulphide sulphur donor atom.
的反应[CR(CO)5 - [图形省略1 H 2 }]用BuLi和CS 2(-100℃),然后通过烷基化,得到标题化合物(1),其结构已被确定X射线与硫化物硫供体原子相比,其中两个优先共排列的硫酮酮硫原子在晶体学上具有相当大的反式影响。
Raubenheimer, Helgard G.; Kruger, Gert J.; Lombard, Antonie Van A., Organometallics, 1985, vol. 4, # 2, p. 275 - 284
作者:Raubenheimer, Helgard G.、Kruger, Gert J.、Lombard, Antonie Van A.、Linford, Lorna、Viljoen, Joey C.