...
首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >Nickel complexes of a bis(benzimidazolin-2-ylidene)pyridine pincer ligand with four- and five-coordinate geometries
【24h】

Nickel complexes of a bis(benzimidazolin-2-ylidene)pyridine pincer ligand with four- and five-coordinate geometries

机译:双(苯并咪唑啉-2-亚甲基)吡啶钳配体的镍配合物,具有四坐标和五坐标的几何形状

获取原文
获取原文并翻译 | 示例
           

摘要

The four- and five-coordinate complexes [(CNC)NiX_2] (X = Cl, Br, I), [(CNC)NiX]PF_6 (X = Cl, Br) and [(CNC)NiCl]Cl·H _2O have been isolated, where CNC is the bis(N-butylbenzimidazolin-2- ylidene)-2,6-pyridine pincer ligand. A five-coordinate geometry is rare for this class of complex. Where amenable, the complexes have been structurally characterised by single crystal X-ray diffraction studies and in solution by NMR, UV-vis and MS studies. The five-coordinate dibromo complex [(CNC)NiBr _2] is readily prepared on the gram-scale from the benzimidazolium salt precursor and Ni(OAc)_2·4H_2O in DMSO without the exclusion of air. Halide exchange and salt metathesis reactions using [(CNC)NiBr_2] afford the other four- and five-coordinate complexes. [(CNC)NiBr_2] displays very low solubility, and upon dissolution affords solutions of the four-coordinate [(CNC)NiBr]~+. Factors that influence the formation of four- or five-coordinate complexes with this ligand class are discussed.
机译:四坐标和五坐标配合物[(CNC)NiX_2](X = Cl,Br,I),[(CNC)NiX] PF_6(X = Cl,Br)和[(CNC)NiCl] Cl·H _2O具有分离,其中CNC为双(N-丁基苯并咪唑啉-2-亚烷基)-2,6-吡啶钳夹配体。对于这类复合体,很少有五坐标几何。在适当的情况下,已通过单晶X射线衍射研究以及在溶液中通过NMR,UV-vis和MS研究对复合物进行了结构表征。由苯并咪唑鎓盐前体和Ni(OAc)_2·4H_2O在DMSO中以克为单位,可以很容易地在克级上制备五坐标二溴配合物[(CNC)NiBr _2],而无需排除空气。使用[(CNC)NiBr_2]进行卤化物交换和盐易位反应,得到其他四坐标和五坐标配合物。 [(CNC)NiBr_2]的溶解度非常低,溶解后可得到四配位[(CNC)NiBr]〜+的溶液。讨论了影响这种配体类别的四或五配位配合物形成的因素。

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