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(tBu2MeSi) 2Sn=Sn(SiMetBu2) 2:一种具有>Sn=Sn<双键的迪斯坦,在固态和溶液中都稳定
Vladimir Ya Lee1, Tomohide Fukawa, Masaaki Nakamoto
1Department of Chemistry, Graduate School of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8571, Japan.
Journal of the American Chemical Society
|August 31, 2006
概括
研究人员合成了一种稳定的非循环迪坦,具有创纪录的短-双键. 这种锡化合物具有独特的结构性质和反应性,类似于基化学.
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:
- 带有锡-锡双键的化合物,是罕见的,通常是不稳定的.
- 之前的研究重点是循环或较少替代的锡化合物.
研究的目的:
- 为了合成和表征一种新的,稳定的非循环的distannene.
- 为了研究这种新化合物的结构,光谱和反应性质.
主要方法:
- 通过与锡 (II) 化物-二氧化物复合物的反应合成化前体.
- 使用X射线晶体学和核磁共振 (NMR) 光谱学的表征.
- 对四化碳和乙烯的反应性和电化学还原的研究.
主要成果:
- 成功合成并分离出一个稳定的非循环二二烯, ((t) Bu (((2) MeSi) ((2) Sn=Sn (((SiMe ((t) Bu ((2)) ((2) 1),作为深绿色的晶体.
- 在一个非循环的distanene中,确定了有史以来最短的Sn=Sn双键长 (2.6683(10) Å,其中几乎是平面的锡原子和扭曲的双键.
- 观察到的反应性与Sn=Sn双键一致,并在减少时产生稳定的二二烯离子基.
结论:
- 合成的化合物代表了第一个稳定的非循环迪斯坦,为研究基于锡的多重结合提供了一个新的平台.
- 这种间隔的独特结构和电子特性为探索新的有机蛋白化学开辟了新的途径.
- 观察到的反应性和离子激素的形成突出显示了distannene和alkene系统之间的类比.
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