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一个T形14电子的stiboranyl-gold复合物的合成,结构和特性
Casey R Wade1, Tzu-Pin Lin, Ryan C Nelson
1Department of Chemistry, Texas A&M University, College Station, Texas 77843-3255, USA.
Journal of the American Chemical Society
|May 14, 2011
概括
一个新型的三价黄金复合物与一个stiboranyl连接体展现出意想不到的有氧性相互作用,表明强大的电子捐赠. 这种复合物与化物发生反应,形成离子酸,扩大了对黄金-反化学的知识.
科学领域:
- 有机金属化学 有机金属化学
- 无机化学 无机化学 有机化学
- 协调化学 协调化学
背景情况:
- 三价黄金复合物比单价黄金复合物少见.
- 通常在单价黄金化合物中观察到有氧性相互作用.
- 了解对黄金电子性质的联结体效应至关重要.
研究的目的:
- 为了合成和描述一种新型的循环stiboranyl-gold复合体.
- 为了研究三价黄金的电子特性和反应性.
- 为了探索离子金-反复合物的形成.
主要方法:
- 金-斯蒂博拉尼尔复合物的合成和结构特征.
- 密度函数理论 (DFT) 的计算.
- 采用X射线吸收近边缘结构 (XANES) 光谱 (Au L(3)-和Sb K-边缘).
- 用各种化物进行反应性研究.
主要成果:
- 合成了一种周期性stiboranyl-gold(III) 复合物 (1),具有T形金质几何形状.
- 该复合体表现出一种不寻常的气友性相互作用,表明富含电子的三价黄金.
- DFT和XANES光谱支持一个aurate-stibonium衍生物.
- 复合物1与化物发生反应,形成一个阳离子酸氧化物复合物 ([2](-)).
结论:
- 斯蒂博拉尼尔连接体赋予三价黄金中心强大的西格玛捐赠特性.
- 合成的复合物表现出独特的电子和粘合特性.
- 阳离子复合物的形成证明了金-系统的新型反应途径.
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