...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Organometallic Chemistry >Synthesis, characterisation and catalytic activity of Pd(II) and Ni(II) complexes with new cyclic alpha-diphenylphosphino-ketoimines. Crystal structure of 2,6-diisopropyl-N-(2-diphenylphosphino-cyclopentylidene)aniline and of 2,6-diisopropyl-N-(2-dip
【24h】

Synthesis, characterisation and catalytic activity of Pd(II) and Ni(II) complexes with new cyclic alpha-diphenylphosphino-ketoimines. Crystal structure of 2,6-diisopropyl-N-(2-diphenylphosphino-cyclopentylidene)aniline and of 2,6-diisopropyl-N-(2-dip

机译：Pd（II）和Ni（II）与新型环状α-二苯基膦基酮亚胺的配合物的合成，表征和催化活性。 2,6-二异丙基-N-（2-二苯基膦基-环亚戊基）苯胺和2,6-二异丙基-N-（2-浸基）的晶体结构

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

New cyclic alpha-diphenylphosphino-ketoimines have been synthesised by deprotonation of the corresponding imine and subsequent reaction with chlorodiphenylphosphine. The crystal structures of two of these compounds containing a cyclopentylidene and cyclohexylidene backbone are discussed. Reaction of these bidentate phosphorus-nitrogen ((PN)-N-boolean AND) ligands with (cod)Pd(CH3)Cl leads to neutral complexes of the general formula ((PN)-N-boolean AND)Pd(CH3)Cl which have been reacted with AgSbF6 to yield cationic complexes of formula [((PN)-N-boolean AND)Pd(CH3)(NCCH3)]SbF6. Reaction of these ligands with (1,2-dimethoxyethane)NiBr2 yields neutral nickel(II) complexes that have been characterised by IR and elemental analysis. Cationic Pd(II) complexes as well as MAO-activated neutral nickel(II) complexes have been used as ethylene oligomerisation catalysts. The cationic palladium(II) complexes show a marked pressure dependence of TOF, with alpha-olefin fraction and Schulz-Flory alpha-values explainable in the light of the accepted mechanism for analogous complexes. By increasing the steric bulkiness of the substituerit on the imine, or by using ligands with cyclohexylidene or cycloheptylidene backbone instead of cyclopentylidene, a drop in catalytic activity is observed. Nickel(II) complexes of the title ligands activated with MAO permit to confirm the latter conclusions. In comparison with palladium their use brings to comparable linearities but higher oligomerisation grades as well as alpha-olefin fraction. Cationic palladium(II) complexes are also active in the propene and 1-butene oligomerisation. (C) 2002 Elsevier Science B.V. All rights reserved. [References: 56]
机译：通过使相应的亚胺去质子化并随后与氯二苯基膦反应，已经合成了新的环状α-二苯基膦基-酮亚胺。讨论了含有环戊叉基和环己叉基主链的两种化合物的晶体结构。这些双齿磷氮（（PN）-N-布尔AND）配体与（cod）Pd（CH3）Cl的反应生成通式（（PN）-N-布尔AND）Pd（CH3）Cl的中性配合物它们已经与AgSbF6反应得到式[（（PN）-N-布尔AND）Pd（CH3）（NCCH3）] SbF6的阳离子配合物。这些配体与（1,2-二甲氧基乙烷）NiBr2反应生成中性镍（II）配合物，已通过IR和元素分析对其进行了表征。阳离子Pd（II）配合物以及MAO活化的中性镍（II）配合物已被用作乙烯低聚催化剂。阳离子钯（II）配合物表现出明显的TOF压力依赖性，α-烯烃含量和Schulz-Floryα值可根据类似配合物的公认机理来解释。通过增加亚胺上取代基的空间体积，或通过使用具有环己叉基或环庚叉骨架而不是环戊叉基的配体，观察到催化活性下降。用MAO活化的标题配体的镍（II）配合物可以证实后一个结论。与钯相比，它们的使用带来可比的线性，但低聚度更高，α-烯烃含量也更高。阳离子钯（II）配合物在丙烯和1-丁烯的低聚反应中也具有活性。 （C）2002 Elsevier Science B.V.保留所有权利。 [参考：56]

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号