Reactions of trialkoxynitridomolybdenum with low-coordinate phosphorus compounds containing a PN double bond
作者:Oleksandr O. Kovalenko、Ishtvan Boldog、Vasyl Kinzhybalo、Tadeusz Lis、Anatolii I. Brusilovets
DOI:10.1039/c0dt00694g
日期:——
of all new compounds was elucidated by 1H, 13C and 31P NMR spectroscopy. Compounds [(Me3Si)2N–P(NSiMe3)(O–tBu)](tBuO)2MoN} (5), [(Me3Si)2N–PS(NtBu)(O–tBu)](tBuO)2MoN} (7), [(Me3Si)2N–P(NSiMe3)2(O–tBu)](tBuO)2MoN} (8) and [(Me3Si)2N–P(NSiMe3)2(O–iPr)](iPrO)2MoN} (12) were also characterized by single X-ray analysis and shown to be metallacycles containing the Mo atom with an intact terminal nitrido
N Mo(OR)3(R = t Bu,i Pr)与(Me 3 Si)2 NPNSiMe 3(1),(Me 3 Si)2 NPN t Bu(2),(Me 3 Si)2的反应已研究了NPS(N t Bu)(3)和(Me 3 Si)2 NP(NSiMe 3)2(4)。报告的配合物是通过在P上加成1,2-的Mo-OR键合成的N键,产生四元相应的σ的metallacycles 2 λ 3 -iminophosphine或σ 3 λ 5 -iminophosphorane与trialkoxynitridomolybdenum。通过1 H,13 C和31 P NMR光谱阐明了所有新化合物的结构。化合物[(Me 3 Si)2 N–P(NSiMe 3)(O– t Bu)] (t BuO)2 Mo N}(5),[(Me 3 Si)2 N–PS(N t Bu) (O– t Bu)] (t BuO)2Mo N}(7),[(Me
Reaction of NW(OtBu)3 with σ3λ5-phosphoranes. The [2 + 2] cycloaddition across the WN triple bond results in the first representative of an inorganic four-membered metallacycle with conjugated endo- and exocyclic double bonds
作者:Oleksandr O. Kovalenko、Vasyl Kinzhybalo、Tadeusz Lis、Oleksiy V. Khavryuchenko、Eduard B. Rusanov、Anatolii I. Brusilovets
DOI:10.1039/c2dt12492k
日期:——
The reactions of NW(OtBu)3 with the low-coordinate phosphorus compounds (Me3Si)2NP(NSiMe3)2 (I) and (Me3Si)2NPS(NtBu) (II) were studied. Quantum chemical calculations were used to determine why Mo- and W-containing compounds with the same composition have different molecular structures.
研究了 NW(OtBu)3 与低配位磷化合物 (Me3Si)2NP(NSiMe3)2 (I) 和 (Me3Si)2NPS(NtBu) (II) 的反应。通过量子化学计算,确定了相同成分的含 Mo 和 W 化合物具有不同分子结构的原因。
Ethylene Polymerization Using Discrete Nickel(II) Iminophosphonamide Complexes
作者:Russell L. Stapleton、Jianfang Chai、Nicholas J. Taylor、Scott Collins
DOI:10.1021/om051103z
日期:2006.5.1
during catalysis. Reaction of 5 with an equimolar amount of propene provides α-methylstyrene, the product of 1,2-insertion followed by β-H elimination. Complex 5 is not effective for polymerization or oligomerization of ethylene under a variety of conditions. The reactions of complex 5 with various phosphine scavengers were studied, and of these only Rh(acac)(C2H4)2 is both effective and selective for
Reactions of (iPrO)3MM(OiPr)3 (M = Mo, W) with low-coordinate phosphorus compounds. Formation of the first four-membered planar metallacycles, containing an MM triple bond
作者:Oleksandr O. Kovalenko、Oleksii A. Brusylovets、Vasyl Kinzhybalo、Tadeusz Lis、Anatolii I. Brusilovets
DOI:10.1039/c1dt10099h
日期:——
The low-coordinate phosphorus compounds (Me3Si)2N–PNSiMe3, (Me3Si)2N–P(S)NtBu and (Me3Si)2N–P(NSiMe3)2 react with (iPrO)3MM(OiPr)3 (M = Mo, W) to form four- and five-membered metallacycles with intact endocyclic or exocyclic MM triple bonds. The first four-membered planar metallacycles, containing an MM triple bond were obtained in reaction with (Me3Si)2N–PNSiMe3.
低配位磷化合物 (Me3Si)2N–PNSiMe3、(Me3Si)2N–P(S)NtBu 和 (Me3Si)2N–P(NSiMe3)2 与 (iPrO)3MM(OiPr)3 (M = Mo, W )形成具有完整环内或环外MM三键的四元和五元金属环。第一个包含 MM 三键的四元平面金属环是通过与 (Me3Si)2N-PNSiMe3 反应获得的。
Process for preparing alpha-olefin polymers and oligomers
申请人:Studiengesellschaft Kohle mbH
公开号:US04724273A1
公开(公告)日:1988-02-09
The invention relates to polymers and oligomers characterized in that they have been prepared from .alpha.-olefin monomers or mixtures thereof and the distances between the methyl branching points are controllable by the selection of the .alpha.-olefins and to a process for preparing said novel polymers and oligomers.