Reactivity of Novel alpha-Halo(alkyl) Transition Metal Complexes

犹他州州立大学的John L.Hubbard将在无机化学、生物无机化学和有机金属化学项目中研究几类过渡金属卤甲基化合物的合成和反应化学。这些化合物是过渡金属α-取代烷基衍生物家族中有价值的新成员，这些化合物被认为是一氧化碳还原、氢甲酰化和其他催化合成等过程中的重要中间体。研究中使用的化合物包括环戊二烯基(或五甲基环戊二烯基)亚硝基金属铬、钼和钨的α-卤代烷以及铁和Ru的环戊二烯基亚硝基卤代金属卤化物和后者的二(卤代烷基)衍生物。通过重氮烷与前驱体金属卤化物的反应，这些化合物的合成最近取得了进展，使得这些化合物变得容易获得。需要研究的一些反应类型包括光解和热分解或重排以及简单的空气氧化。

The synthetic and reaction chemistry of several classes of transition metal halomethyl compounds will be investigated by John L. Hubbard of Utah State University in this project in the Inorganic, Bioinorganic and Organometallic Chemistry Program. These compounds are valuable new members of the family of alpha-substituted alkyl derivatives of transition metals which are known to be important intermediates in processes such as carbon monoxide reduction, hydroformylation and other catalytic syntheses. The compounds to be employed in the study include cyclopentadienyl (or pentamethylcyclopentadienyl) nitrosyl metal alpha-haloalkyls of chromium, molybdenum and tungsten as well as cyclopentadienyl nitrosyl haloalkyl metal halides of iron and ruthenium and the di(haloalkyl)derivatives of the latter metals. The compounds have been made readily accessable by recent impvovements in their synthesis via the reaction of diazoalkanes with precursor metal halides. Some reaction types to be studied are photolytic and thermal decompositions or rearrangements and simple air oxidations.