Confirmation of the pentadienyl/alkyne [5 + 2] cycloaddition reactivity of the Cp*Co(η5-1,2,5-trimethylpentadienyl)+ complex
作者:Chandika D. Ramful、Zachary E. Konway、Stephanie Boudreau、Jetsuda Areephong、Katherine N. Robertson、Kai E.O. Ylijoki
DOI:10.1016/j.jorganchem.2016.10.015
日期:2016.12
The [5 + 2] cycloaddition reactivity of the Cp*Co(η5-1,2,5-trimethylpentadienyl)+ complex and ethyne has been demonstrated. This reactivity was predicted computationally and runs against previous synthetic observations of decreasing reactivity with increasing substitution. The pentadienyl complex and the resulting Cp*Co(η2,η3-1,2,5-trimethylcycloheptadienyl)+ species have been characterized spectroscopically
在CP * Co的[5 + 2]环加成反应(η 5 -1,2,5- trimethylpentadienyl)+复杂和乙炔已被证明。该反应性是通过计算预测的,并且与先前的反应性随取代度增加而降低的合成观察结果背道而驰。戊二烯基的配合物,将所得的Cp *钴(η 2,η 3 -1,2,5- trimethylcycloheptadienyl)+种已被光谱和晶体学表征。戊二烯基的复合物的X-射线结构具有两者之间的二面角η 5落在预期的反应性范围(3.1(8)°)内的结合平面,为我们计算得出的结构/反应性关系提供了有力的支持。