金属化物复合物的激活由三三-丁-和基组
Richard D Adams1, Burjor Captain, Eszter Trufan
1Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, USA. Adams@mail.chem.sc.edu
金属化物HM(CO) 4SnPh3,其中M是 (Os) 或 (Ru),在或复合物的存在下与乙烯 (PhC2H) 反应. 这种反应导致乙烯插入金属化物键,形成新的有机金属化合物.
科学领域:
- 有机金属化学 有机金属化学
- 协调化学 协调化学
- 催化剂是一种催化剂.
背景情况:
- 金属化物是催化循环中的关键中间体.
- 奥斯和化与不和分子的反应性具有显著的兴趣.
- 和复合物可以在有机金属反应中充当激活剂或催化剂.
研究的目的:
- 为了研究HM(CO) 4SnPh3 (M=Os,Ru) 与乙烯 (PhC2H) 的反应.
- 探索和复合体在激活这些金属化物中的作用.
- 描述从将PhC2H插入M-H键中形成的产品.
主要方法:
- 有机金属化合物的合成和表征.
- 涉及金属化物,和过渡金属复合物的反应.
- 光谱分析 (例如,NMR,IR) 用于结构阐明.
- 计算研究 (芬斯基-霍尔分子轨道) 为机械洞察力.
主要成果:
- 奥斯和鲁化被Pt(PBu(t) 3) 2和Pd(PBu(t) 3) 2激活到PHC2H插入的方向.
- 通过插入到Os-H和Ru-H键中,形成了异构性基合复合体.
- 一个带有桥接基联体的Pt-Os附加物被分离和特征.
- 一个Os-H adduct与PhC2H的进一步反应导致了一个Butadienyl-ligated复合体.
- 计算分析表明,原子的LUMO是PhC2H添加的初始地点.
结论:
- 该研究表明,乙烯易于插入由Pt和Pd复合体催化的HM(CO) 4SnPh3的M-H键中.
- 异构体产物的形成突出显示了插入过程的区域选择性.
- Pt-Os 引提供了对基激活和插入机制的洞察.
- 这些发现有助于理解有机金属化学中的反应模式和潜在的催化应用.
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