Oligomers of allene. Part II. Dimers and trimers formed in the thermal polymerisation of liquid allene
作者:B. Weinstein、A. H. Fenselau
DOI:10.1039/j39670000368
日期:——
Thermal polymerisation of liquid allene affords two dimers, 1,2-dimethylenecyclobutane and 1,3-dimethylene-cyclobutane, as well as three trimers, 1,5(and/or 1,6)-dimethylenespiro[3,3]heptane, 1,2,4-trimethylenecyclohexane and 3-methylenebicyclo[4,2,0]octa-1(6)-ene. A radical mechanism is proposed.
Allene cyclooligomerization and polymerization catalyzed by a nickel(0) complex
作者:Ralph J. De Pasquale
DOI:10.1016/s0022-328x(00)82649-2
日期:1971.11
The complex bis(triphenylphosphine)nickel(0) catalytically converts allene into a mixture of isomeric trimers, a tetramer, a pentamer, isomeric hexamers, waxes and polymer. The complex initially formed in the reaction, (Ph3P)2NiC3H4, was isolated and characterized. The structures of products trapped in competitive experiments with ethylene and methyl acrylate indicate the intervention of subsequent
复杂的双(三苯基膦)镍(0)催化将丙二烯转化为异构体三聚体,四聚体,五聚体,异构体六聚体,蜡和聚合物的混合物。分离并表征了反应中最初形成的配合物(Ph 3 P)2 NiC 3 H 4。用乙烯和丙烯酸甲酯进行竞争性实验捕获的产物结构表明,随后的络合物参与了低聚物形成反应。根据这些数据来考虑机械路线。
Reaction paths and mechanisms in the catalytic cycloaddition of allene over nickel(0) template systems
作者:Sei Otsuka、Kazuhide Tani、Tsuneaki Yamagata
DOI:10.1039/dt9730002491
日期:——
Catalyticcycloadditions of allene, CH2CCH2, have been effected with a variety of nickel(0)–phosphorus ligand systems. The selective catalyticreactionpath leading to the cyclotetramer, cyclotetramer, or cyclopentamer depends primarily on the nature of the ligands. Intermediate nickel(0) complexes containing the linear trimer (C9H12) or tetramer (C12H16) have been detected spectroscopically or isolated
艾伦(CH 2 C CH 2)的催化环加成反应已通过多种镍(0)-磷配体系统实现。导致环四聚体,环四聚体或环戊二烯的选择性催化反应路径主要取决于配体的性质。包含线性三聚体(C 9 H 12)或四聚体(C 12 H 16)的中间体镍(0)配合物)已通过光谱检测或通过磷配体稳定化分离。基于分离的配合物的结构和动力学,描述了多步反应路径,并讨论了磷配体在这些催化剂中的作用。
Modified bisimide compositions
申请人:Shell Oil Company
公开号:US05449726A1
公开(公告)日:1995-09-12
A modified bisimide resin is prepared by copolymerizing a bisimide monomer and a cyclic triene. The copolymerization of a bisimide with a cyclic triene such as 1,2,4-trimethylenecyclohexane provides a modified bisimide having good fracture toughness.