• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文学位 >I. Applications of fourier transform ion-cyclotron-resonance mass spectrometry to the studies of the isomers of the organometallic distonic ion and the reactivity of cobalt iodide. II. Analysis of polymers by matrix-assisted laser desorption/ionization--time-of-flight.
【24h】

I. Applications of fourier transform ion-cyclotron-resonance mass spectrometry to the studies of the isomers of the organometallic distonic ion and the reactivity of cobalt iodide. II. Analysis of polymers by matrix-assisted laser desorption/ionization--time-of-flight.

机译：一，傅里叶变换离子回旋共振质谱技术在有机金属二硅离子的异构体和碘化钴反应性研究中的应用。二。通过基质辅助激光解吸/电离-飞行时间分析聚合物

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

The study of organometallic distonic ion, Fe(p-benzyne) +, and it achieved by CID and ion-molecule reactions with selected alkenes and alkyl halides. The distonic ion, Fe(p-benzyne) + demonstrates unique reactivity toward most of these reagents unlike those of its isomers. In most reactions, it is seen that the charged metal center plays the major role, while the radical site is mostly inert. Other attempts have been made to generate and investigate new organometallic species with different charged metals or different ligands, such as iodoaniline or cyclopentadienyl. The unique reactivity of CoI+ with alkanes is studies. It is proposed that a C-H insertion followed by β-hydrogen transfer yields the dehydrogenation product. The iodine atoms appears to suppress the isomerization of the CoI(alkene)+ complex to a hydrido π-allyl complex ion. The most unique reaction observed is the selective 2,3-dehydrogenation of n-butane with CoI+.; The use of metallocenes in polymer analysis by MALDI-TOF is first reported. Ferrocene and nickelocene cationized the polystyrenes and polyethylene glycols, while cobaltocene cationized only the polyethylene glycols. The higher molecular weight polymers achieved higher signal intensities than the low molecular weight polymers. In fact, PS 13700 had the highest signal intensity with very little if any metal cluster signals. In analyzing polymers by MALDI-TOF it is important to utilize metal salts as cationizing agents. The effect of the concentration of the cationizing agent, AgTFA, is studied. The results show that for low molecular weight polymer the concentration of the cationing agent does not significantly alter the signal intensity or the abundance of metal clusters. On the other hand, for high molecular weight polymers the concentration plays a major role in the signal intensity and the formation of metal clusters.
机译：对有机金属二阶离子Fe（ p -benzyne） + 的研究，通过CID和与选定的烯烃和卤代烷的离子分子反应实现。铁离子Fe（ p -benzyne） + 对大多数这些试剂表现出独特的反应性，与其异构体不同。在大多数反应中，可以看到带电的金属中心起主要作用，而自由基位主要是惰性的。已经进行了其他尝试以产生和研究具有不同带电金属或不同配体的新有机金属物质，例如碘苯胺或环戊二烯基。研究了CoI + 与烷烃的独特反应性。提出C-H插入然后β-氢转移产生脱氢产物。碘原子似乎抑制了CoI（烯烃） + 配合物向氢化π-烯丙基配合物离子的异构化。观察到的最独特的反应是用CoI + 对正丁烷进行选择性2,3-脱氢。首次报道了茂金属在通过MALDI-TOF进行的聚合物分析中的用途。二茂铁和二茂镍将聚苯乙烯和聚乙二醇阳离子化，而钴茂仅使聚乙二醇阳离子化。较高分子量的聚合物比低分子量聚合物获得更高的信号强度。实际上，PS 13700具有最高的信号强度，几乎没有金属簇信号。在通过MALDI-TOF分析聚合物时，重要的是利用金属盐作为阳离子化剂。研究了阳离子化剂AgTFA浓度的影响。结果表明，对于低分子量聚合物，阳离子剂的浓度不会显着改变信号强度或金属簇的丰度。另一方面，对于高分子量聚合物，浓度在信号强度和金属簇的形成中起主要作用。

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