Synthesis of anionic sandwich compounds: [Ti(η-C<sub>6</sub>H<sub>5</sub>R)<sub>2</sub>]<sup>–</sup>and the crystal structure of [K(18-crown-6)(µ-H)Mo(η-C<sub>5</sub>H<sub>5</sub>)<sub>2</sub>]
作者:Judith A. Bandy、Adam Berry、Malcolm L. H. Green、Robin N. Perutz、Keith Prout、Jean-Noel Verpeaux
DOI:10.1039/c39840000729
日期:——
Treatment of Mo(µ-C5H5)2H2 with potassium hydride and 18-crown-6 gives the compound [k(18-crown-6)(µ-H)Mo(η-C5H5)2] whose crystal structure has been determined; the compounds Ti(η-C6H5R)2, R = H or Me undergo reduction with potassium metal to give the salts K+[Ti(η-C6H5R)2]â, R = H or Me.
Reactions of transition-metal vapours with cycloheptatriene and cyclo-octatetraene
作者:Peter L. Timms、Terence W. Turney
DOI:10.1039/dt9760002021
日期:——
The co-ordination of cycloheptatriene in reactions with transition-metal atoms in the condensed phase at low temperature is accompanied by extensive hydrogen migration. Thus, condensation of C7H8 with the vapours of Ti, V, Cr, Fe, and Co affords [Ti(η-C7H7)(η5-C7H9)], V(C14H16), [Cr(η-C7H7)(η4-C7H10)], [Fe(η5-C7H7)(η5-C7H9)] or FeC14H18, and CoC14Hn(n= 15, 17, or 19) respectively. No organometallic
环庚三烯在低温下与缩合相中过渡金属原子的反应配位伴随着大量的氢迁移。因此,C的缩合7 ħ 8与钛,钒,铬,铁,和Co得到钛[Ti(η-C的蒸气7 ħ 7)(η 5 -C 7 ħ 9)],V(C 14 ħ 16),[CR(η-C 7 H ^ 7)(η 4 -C 7 ħ 10)],[铁(η 5 -C 7 ħ 7)(η 5 -C 7 ħ 9)]或FeC 14 H 18和CoC 14 H n(n = 15、17或19)。尚未从Mn,Ni或Pd的蒸气中分离出任何有机金属产物。PF 3 -C 7 H 8混合物与Cr或Co蒸气的缩合分别提供[Cr(C 7 H 8)(PF 3)3 ]或[Co(C 7 H 7)(PF 3)3 ]。C 8 H 8与Ti,Fe和Co蒸气的缩合产生难处理的聚合物,但与铬蒸气[Cr 2得到(C 8 H 8)3 ]。将金属原子在烯烃金属配合物中的制备与常规还原方法进行了比较。
A new catalyst for ethylene polymerization based on the oxidation product of dibenzenetitanium(0) with fullerene
作者:E. F. Kvashina、Z. M. Dzhabieva、O. N. Efimov、M. G. Kaplunov
DOI:10.1007/s11172-009-0230-0
日期:2009.8
catalyst for ethylene polymerization under mild conditions (room temperature, pressure below atmospheric) was obtained for the first time on the basis of the oxidation product of dibenzenetitanium(0) with fullerene. Polyethylene formed in the reaction was characterized by IR and Ramanspectra. Molecular mass of the product (1 634 000), melting point (133 °C) and the degree of crystallinity (79.4%) were determined
Electronic Properties of Organometallic Metal−Benzene Complexes [M<i><sub>n</sub></i>(benzene)<i><sub>m</sub></i> (M = Sc−Cu)]
作者:Tsuyoshi Kurikawa、Hiroaki Takeda、Masaaki Hirano、Ken Judai、Tadashi Arita、Satoshi Nagao、Atsushi Nakajima、Koji Kaya
DOI:10.1021/om9807349
日期:1999.4.1
Neutral metal−benzene complexes, Mn(benzene)m (M = Sc to Cu), are produced for all of the 3d transition metals in the gas phase by using the laser vaporization method. These species are characterized by mass spectrometry, photoionization spectroscopy, and chemical probe experiments. Depending on the metal, there are two types of structures for Mn(benzene)m: multiple-decker sandwich structures and
通过使用激光汽化方法,为气相中的所有3d过渡金属生成了中性金属-苯络合物M n(苯)m(M = Sc至Cu)。这些物质的特征在于质谱,光电离光谱和化学探针实验。取决于金属,M n(苯)m有两种类型的结构:多层夹心结构和完全覆盖有苯分子的金属团簇(米饭球结构)。前者的夹心结构是早期过渡金属(Sc-V)配合物的特征,而后者是后过渡金属(Fe-Ni)的形成。M 1(苯)x(x = 1,2)通过系统测量电离能(E i 's)来研究络合物。