• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Chemistry: A European journal >Zinc Hydrazides and Alkoxyhydrazides: Organometallic Compounds with Novel Zn_4N_8,Zn_4N_6O and Zn_4N_4O_2 Cage Structures
【24h】

Zinc Hydrazides and Alkoxyhydrazides: Organometallic Compounds with Novel Zn_4N_8,Zn_4N_6O and Zn_4N_4O_2 Cage Structures

机译：氢化锌和烷氧基肼：具有新型Zn_4N_8，Zn_4N_6O和Zn_4N_4O_2笼结构的有机金属化合物

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

Tetrameric [{RZn-(NHNMe_2)}_4] (R = Me,Et),the first organometallic zinc hydrazides to be described,have been prepared by alkane elimination from dialkylzinc solutions and N,N-dimethylhydrazine.They were characterised by ~1H and ~(13)C NMR and IR spectroscopy,mass spectrometry,elemental analysis and X-ray crystallography.The compounds form asymmetric aggregates containing the novel Zn_4N_8 core;tetrahedra of Zn atoms bear the alkyl groups at Zn,with the triangular faces bridged by NHNMe_2 substituents.The NH groups are connected to two Zn atoms,and the NMe_2 groups to one.Hydrolysis of the compounds with water gives [(RZn)_4(OH)(NHNMe_2)_3] as products,which also were characterised as described above.Higher yields of these hydroxo clusters were achieved in one-pot syntheses by reaction of dialkylzinc solutions with mixtures of N,N-dimeth-ylhydrazine and water.They contain Zn_4N_6O cages,in which one hydroxide in the tetrameric hydrazides described above replaces one NHNMe_2 group.Similar products can be prepared with alkoxy instead of hydroxy groups,in analogous one-pot syntheses with alcohols.Alcoholysis of [EtZn(NHNMe_2)]_4 with methanol or ethanol gave zinc trishydrazide monoalkoxides,[(EtZn)_4(OR)(NHNMe_2)_3] (R = Me,Et),which have constitutions analo gous to the monohydroxides.The organozinc bishydrazide bisalkoxides [(MeZn)_4(NHNMe_2)_2(OEt)_2] and [(EtZn)_4(NHNMe_2)_2(OEt)_2] were obtained in one-pot reactions from dialkylzinc solutions with mixtures of the hydrazine and alcohol,and their crystal structures,confirmed by spectroscopic methods in solution,show an unsym-metrical aggregation with the novel Zn_4N_4O_2 cage structure.
机译：四元[{RZn-（NHNMe_2）} _ 4]（R = Me，Et），是要描述的第一种有机金属酰肼锌，是通过从二烷基锌溶液和N，N-二甲基肼中消除烷烃制备的。它们的特征是〜1H以及〜（13）C NMR和IR光谱，质谱，元素分析和X射线晶体学分析。这些化合物形成了不对称的聚集体，其中包含新颖的Zn_4N_8核; Zn原子的四面体在Zn处带有烷基，而三角形的面由桥连NHNMe_2取代基。NH基团连接两个Zn原子，而NMe_2基团连接一个。用水将化合物水解，生成[（RZn）_4（OH）（NHNMe_2）_3]产物，其特征如上所述。一锅合成法通过二烷基锌溶液与N，N-二甲基丁基肼和水的混合物反应，可提高这些羟基簇的收率。它们含有Zn_4N_6O笼，其中上述四聚酰肼中的一种氢氧化物替代了一种NHNMe_2西米尔集团可以用烷氧基代替羟基，通过与醇的类似的一锅合成制备ar产物。[EtZn（NHNMe_2）] _ 4与甲醇或乙醇的醇解得到三酰肼锌单醇盐，[（EtZn）_4（OR）（NHNMe_2） _3]（R = Me，Et），其结构与一元氢氧化物类似。有机锌双酰肼双醇盐[（MeZn）_4（NHNMe_2）_2（OEt）_2]和[（EtZn）_4（NHNMe_2）_2（OEt） _2]由二烷基锌溶液与肼和醇的混合物一锅反应制得，其晶体结构通过分光光度法在溶液中确认，显示出具有新型Zn_4N_4O_2笼型结构的不对称聚集。

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