...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >Synthesis of heteroboroxines with MB_2O_3 core (M = Sb, Bi, Sn)-an influence of the substitution of parent boronic acids
【24h】

Synthesis of heteroboroxines with MB_2O_3 core (M = Sb, Bi, Sn)-an influence of the substitution of parent boronic acids

机译：具有MB_2O_3核（M = Sb，Bi，Sn）的杂硼烷的合成-母体硼酸取代的影响

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

The synthesis and structure of stiba-, stanna- and bismaheteroboroxines of a general formula L(E)M- [(OBR)_2O] supported by a N,C,N-chelating ligand L [where L = C_6H_3-2,6-(CH_2NMe_2)_2, M, E = Sb, lone pair or Sn, Ph or Bi, lone pair] is reported. The target compounds are prepared by straightforward one-step reactions between oxides (LMO)_2 (M = Sb or Bi) or organotin(IV) carbonate L(Ph)Sn(CO_3) with four or two molar equivalents of corresponding organoboronic acid. All compounds were characterized with the help of elemental analysis, multinuclear NMR spectroscopy and on several occasions the molecular structure was determined using single-crystal X-ray diffraction analysis. The influence of both the substitution of the parent organoboronic acid and the central atom used on the feasibility of the condensation reaction was addressed. Furthermore, several heteroboroxines containing nitrogen donor functionality (i.e. NH_2, NMe_2, CN or 4-pyridyl) included in the boronic acid residue were synthesized and characterized with the aim to prepare boroxine-based covalent frameworks (through intermolecular N→B interactions) containing metal atoms in their structures. Although no such intermolecular bonding was detected in solution of these compounds, it was shown that the organotin(IV) heteroboroxine substituted by 4-pyridyl group forms an infinite polymeric chains via N→B interactions in the solid state. This polymer collapsed back to monomeric units upon dissolution.
机译：由N，C，N螯合配体L [其中L = C_6H_3-2,6-支撑的通式为L（E）M- [（OBR）_2O]的stiba-，stanna-和bismaheteroboroxines的合成和结构报告（CH_2NMe_2）_2，M，E = Sb，孤对或Sn，Ph或Bi，孤对]。通过在氧化物（LMO）_2（M = Sb或Bi）或碳酸有机锡（IV）碳酸L（Ph）Sn（CO_3）与四个或两个摩尔当量的相应有机硼酸之间进行直接的一步反应即可制备目标化合物。所有化合物均通过元素分析，多核NMR光谱进行了表征，并在某些情况下使用单晶X射线衍射分析确定了分子结构。研究了母体有机硼酸和所用中心原子的取代对缩合反应可行性的影响。此外，合成并表征了硼酸残基中所含的几种含氮供体官能团（即NH_2，NMe_2，CN或4-吡啶基）的杂硼恶烷，并对其进行了表征，目的是（通过分子间的N→B相互作用）制备含有金属的基于环硼氧烷的共价骨架。结构中的原子。尽管在这些化合物的溶液中未检测到这种分子间键合，但显示出被4-吡啶基取代的有机锡（IV）杂硼氧烷通过固态的N→B相互作用形成了无限的聚合物链。该聚合物在溶解时崩解回到单体单元。

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