Stabilisation of vinylic intermediate in the addition, cylisation, and oligomerisation reactions of alkynes by co-ordination to molybdenum and tungsten. The crystal and molecular structure of [W(SC<sub>6</sub>H<sub>4</sub>Me-p){η<sup>2</sup>-C(CF<sub>3</sub>)·C(CF<sub>3</sub>)PEt<sub>3</sub>}(η<sup>2</sup>-CF<sub>3</sub>CCCF<sub>3</sub>)(η-C<sub>5</sub>H<sub>5</sub>)] and [WCl{η<sup>2</sup>-C(CF<sub>3</sub>)·C(CF<sub>3</sub>)CNBu<sup>t</sup>}(η<sup>2</sup>-CF<sub>3</sub>CCCF<sub>3</sub>)(η-C<sub>5</sub>H<sub>5</sub>)]
作者:Jack L. Davidson、Giuseppe Vasapollo、Ljubica Manojlović-Muir、Kenneth W. Muir
DOI:10.1039/c39820001025
日期:——
Nucleophilic atteck of phosphines, phosphites, and t-butyl isocyanide (L) on the bis-hexafluorobut-2-yne complexes [WBr2CO(CF3CCCF3)2] and [MX(CF3CCCF3)2(η-C5H5)](M = Mo, W; X = Cl, SC6F5: M = W; X = SC6H6Me-p) occurs at an acetylenic carbon atom to give 1:1 adducts shown by X-ray deffraction studies to contain a metal-stabilised 1â3 dipolar vinyl ligand LC(CF3)·C(CF3) co-ordinated in an η2 manner to the metal centre.
磷化物、亚磷酸酯和叔丁基异氰化物(L)对双六氟丁炔配合物[WBr2CO( CC )2]和[MX( CC )2(η-C5H5)](M = Mo,W;X = Cl,SC6F5;M = W;X = SC6H6Me-p)的亲核攻击发生在乙炔碳原子上,通过X射线衍射研究证实形成了含有一个金属稳定的一价三价偶极乙烯配体LC(CF3)·C( ),该配体以η2方式与金属中心配位,形成1:1加合物。
Bimetallic complexes of molybdenum and tungsten with functionalized diphosphines: X-ray crystal structure of [{W(CO)3}(μ-mtppe)]
作者:Mohammed F.M. Al-Dulaymmi、Peter B. Hitchcock、Raymond L. Richards
DOI:10.1016/s0277-5387(00)80681-6
日期:1989.1
The binuclear complexes [M(CO)3}2(μ-diphos)] (M = Mo or W; diphos = mtppm, mtppe or iptppe) (X-ray structure for M = W, diphos = mtppe), [M(CO)4}2 (μ-dppmpe)] and [MBr2(CO)2}2(μ-mtppe)], and the mononuclear compounds [M(CO)4(dbtpe)] and [MoBr2(CO)2(mtppe)] have been prepared.