首页> 美国卫生研究院文献>Frontiers in Chemistry >The Zn(II)-1,4,7-Trimethyl-1,4,7-Triazacyclononane Complex: A Monometallic Catalyst Active in Two Protonation States
【2h】

The Zn(II)-1,4,7-Trimethyl-1,4,7-Triazacyclononane Complex: A Monometallic Catalyst Active in Two Protonation States

机译:Zn(II)-1,4,7-三甲基-1,4,7-三氮杂环壬烷络合物:在两个质子化状态下具有活性的单金属催化剂

代理获取
本网站仅为用户提供外文OA文献查询和代理获取服务,本网站没有原文。下单后我们将采用程序或人工为您竭诚获取高质量的原文,但由于OA文献来源多样且变更频繁,仍可能出现获取不到、文献不完整或与标题不符等情况,如果获取不到我们将提供退款服务。请知悉。

摘要

In this paper, the unusual reactivity of the complex Zn(II)-1,4,7-trimethyl-1, 4,7-triazacyclononane (2) in the transesterification of the RNA-model substrate, HPNP (3), is reported. The dependence of the reactivity (k2) with pH does not follow the characteristic bell-shape profile typical of complexes with penta-coordinated metal centers. By the contrary, two reactive species, featuring different deprotonation states, are present, with the tri-aqua complex being more reactive than the mono-hydroxy-diaqua one. Apparently, such a difference arises from the total complex charge which plays an important role in the stability of the transition state/s of the reactions. Relevant insight on the reaction mechanism were hence obtained.
机译:在本文中,复杂的Zn(II)-1,4,7-三甲基-1,4,7-三氮杂环壬烷( 2 )在RNA模型底物的酯交换反应中具有异常的反应活性,报告了HPNP( 3 )。反应性(k2)与pH的相关性不遵循具有五配位金属中心的配合物的典型钟形轮廓。相反,存在两种具有不同去质子化状态的反应性物质,其中三水-络合物比单-羟基二水合物更具反应性。显然,这种差异是由总的复合电荷引起的,其在反应的一个或多个过渡态的稳定性中起重要作用。因此获得了有关反应机理的相关见解。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
代理获取

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