...
【24h】

Cyclobutadiene Dianion

机译:环丁二烯二阴离子

获取原文
获取原文并翻译 | 示例
           

摘要

In this account,we present the synthesis and chemistry of the dilithium salts of the cyclobutadiene dianion (CBD~(2-) ), which contains a doubly charged four-membered ring system. The transmetalation reaction of tetrasilyl-substituted cyclobutadiene (CBD) cobalt complexes (5,6) with lithium metal led to the formation of the corresponding dilithium salts of CBD~(2-) (10,11).The aromaticity of the CBD~(2-) species has been studied on the basis of structural characteristics and magnetic properties.The dilithium salts of CBD~(2-) stabilized by both phenyl and silyl groups (12-14) were also prepared by a similar procedure,starting from the corresponding CBD cobalt complexes (7-9).The CBD~(2-) species have been fully characterized by NMR studies and X-ray crystallography. The two-electron oxidation reaction of the tetrasilyl-CBD~(2-) (10,11) with 1,2-dibromoethane produced the neutral CBD derivatives (17,22).The structures, properties,and reactivities of the tetrasilyl-substituted CBD are also reviewed here.Tetrakis(trimethylsilyl)tetrahedrane (26) was synthesized by irradiation of tetrakis(trimethylsilyl)cyclobutadiene (17).The structure and properties of tetrahedrane (26) are presented.
机译:为此,我们提出了环丁二烯二价阴离子(CBD〜(2-))的双锂盐的合成和化学反应,该双锂盐包含一个双电荷的四元环系统。四甲硅烷基取代的环丁二烯(CBD)钴配合物(5,6)与锂金属的金属转移反应导致形成了相应的CBD〜(2-)二锂盐(10,11).CBD〜(根据结构特征和磁性,对2-)物种进行了研究。还通过类似的方法从苯基和甲硅烷基(12-14)稳定了CBD〜(2-)的二锂盐。相应的CBD钴配合物(7-9)。CBD〜(2-)物种已通过NMR研究和X射线晶体学充分表征。四甲硅烷基-CBD〜(2-)(10,11)与1,2-二溴乙烷的双电子氧化反应生成了中性CBD衍生物(17,22)。四甲硅烷基-CBD〜(2-)(10,11)的结构,性质和反应性通过四(三甲基甲硅烷基)环丁二烯(17)的辐照合成了四(三甲基甲硅烷基)四面体(26),并给出了四面戊二烯(26)的结构和性能。

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