Intermediate Oxidation States and pi-Donor Ligands as a Means to High Reactivity in the Early Transition Metals

在无机、生物无机和有机金属化学项目的这个项目中，亚利桑那大学的David E. Wigley将研究最近发现的一种芳烃钽配合物和其他相关的钽和钨配合物的化学性质，其中过渡金属处于中间氧化态。这些化合物可能在发展碳氢活化化学以及在有机化学特别是芳烃化学中产生新的合成方法方面具有重要价值。中间氧化态的组合ıtypically钽（III）或钨（IV）！和硬给体ıtypically醇氧化合物！可以期望给予这些配合物高的反应性。研究了这些芳烃过渡金属醇化合物的一般合成路线，研究了分子内C-H金属化的机理，并研究了芳烃部分的其他反应。

In this project within the Inorganic, Bioinorganic and Organo- metallic Chemistry Program, David E. Wigley of the University of Arizona will investigate the chemistry of a recently discovered arene tantalum complex and other related complexes of tantalum and tungsten in which the transition metals are in intermediate oxidation states. These compounds may be of value in developing carbon-hydrogen activation chemistry as well as leading to new synthetic methodologies in organic chemistry and in arene chemistry in particular. The combination of intermediate oxidation states ıtypically tantalum(III) or tungsten(IV)! and hard pi-donor ligands ıtypically alkoxides! can be expected to impart high reactivity to these complexes. General synthetic routes to these arene transition metal alkoxide compounds will be investigated, the mechanism of intramolecular C-H metallation examined, and other reactions of the arene moieties surveyed.