...
首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >N-heterocyclic carbenes bearing two, one and no nitrogen atoms at the ylidene carbon: insight from theoretical calculations
【24h】

N-heterocyclic carbenes bearing two, one and no nitrogen atoms at the ylidene carbon: insight from theoretical calculations

机译:亚杂环碳原子上带有两个,一个和一个氮原子的N-杂环卡宾:理论计算的启示

获取原文
获取原文并翻译 | 示例
           

摘要

Electronic structure, thermodynamic stability and ligand properties in LRh(CO)(2)Cl complexes of a series of N-heterocyclic carbenes (NHCs) were studied at the DFT level. The systems under study are: imidazolin-2-ylidene (1), imidazolidin-2-ylidene (2), cyclic(alkyl)(amino) carbene (CAAC, 3), pyrazolin-3-ylidene (4), pyridin-2-ylidene (5), and pyridin-4-ylidene (6). The main structural feature influencing the properties of these species is the number of nitrogen atoms at the ylidene carbon. A decrease of the number of nitrogen atoms on the one hand leads to an increase in donor ability and ligand-to-metal bond strength, but lowers the stability of the NHC on the other hand. The number of nitrogen atoms can be taken as a key parameter for the classification of carbenes into 2N-NHC, 1N-NHC and r-NHC (r = remote).
机译:在DFT级研究了一系列N-杂环卡宾(NHC)的LRh(CO)(2)Cl配合物的电子结构,热力学稳定性和配体性质。所研究的系统为:咪唑啉-2-亚基(1),咪唑烷基-2-亚基(2),环(烷基)(氨基)卡宾(CAAC,3),吡唑啉-3-亚基(4),吡啶2 -亚基(5)和吡啶-4-亚基(6)。影响这些物质性质的主要结构特征是亚烷基碳上的氮原子数。氮原子数的减少一方面导致供体能力和配体-金属键强度的提高,但另一方面降低了NHC的稳定性。氮原子的数量可以作为将卡宾分为2N-NHC,1N-NHC和r-NHC(r =远端)的关键参数。

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