较重的主群化物的异构形式:对[Sn(Ar) H]2 (Ar = ) 系统的实验和理论研究
Eric Rivard1, Roland C Fischer, Robert Wolf
1Department of Chemistry, University of California, Davis, One Shields Avenue, Davis, California, 95616, USA.
这项研究报告了新的锡 (II) 化物,包括对称二元和阻碍非对称化物. 绝缘散体影响它们在溶液中的结构,由于降低了连接体排斥,有利于不对称的形式.
科学领域:
- 有机金属化学 有机金属化学
- 无机化学 无机化学
- 材料科学 材料科学 材料科学
背景情况:
- 锡化是合成中重要的前体和试剂.
- 了解化的结构多样性和反应性对于开发新的化学转换至关重要.
- 绝缘效应在决定有机金属化合物的协调和结构方面发挥着重要作用.
研究的目的:
- 合成和描述新型对称和不对称的双价锡 (II) 化物.
- 在固态和溶液中研究对称和阻碍不对称的锡化物之间的结构差异.
- 通过实验和理论方法阐明固体阻碍对溶液中化的首选异构体形式的影响.
主要方法:
- 通过直接降解烯基化物前体或转载反应合成锡化物.
- 使用X射线晶体学,Mössbauer光谱学,IR,UV-vis和NMR光谱学进行表征.
- 计算研究包括各种异构体和光谱性质的DFT计算.
主要成果:
- 对称的二面性锡二化物[4-X-Ar')Sn(mu-H) ]2和一个阻碍的非对称的锡化物 (3,5-iPr2-Ar*) SnSn(H) 2 ((3,5-iPr2-Ar*) 的分离和特征.
- 固态结构揭示了具有长 Sn-Sn 分离的中心对称二次体,以及阻碍化物独特的混合价值非对称结构.
- 溶液研究和理论计算表明,由于降低了固体排斥力,阻碍化物中偏好了不对称的ArSnSn(H) 2Ar形式.
结论:
- 固体阻碍是确定双价化的溶液结构的一个关键因素.
- 对不对称的ArSnSn(H) 2Ar异构体比对称的[ArSn(mu-H) ]2异构体更受青,用于对硬质要求高的连接体.
- 这项工作提供了对有机蛋白化物结构性质关系的基本见解.
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