The Chemistry of Organosamarium (II) and Related Complexes

William J.Evans博士，加州大学欧文分校化学系，由化学部无机、生物无机和有机金属计划支持，研究有机胺(II)和相关络合物的化学。该项目的总体目标是通过探索、定义和开发二价钐的特殊性质来识别和开发新类型的化学和化学转化。四个具有普遍重要性的领域将被研究：碳氢化合物偶联过程中碳-碳键的形成，含氧底物的插入化学，含有元素-元素键的主族底物的化学，以及可分离的烷烃可溶碳正离子的合成和反应活性。金属化合物被用来促进许多重要的化学过程。然而，有一类金属，称为镧系元素，其化学性质并不是很发达。在过去的几年里，出现了一些诱人的迹象，表明作为稀土元素之一的钐，可能具有迄今未被认识到的调节化学反应的能力。在这个项目中，将评估一系列钐化合物活化碳氢化合物以及在碳和其他元素之间断裂和形成键的能力。这将有助于发现钐的新用途，这是一种在美国随时可以买到的廉价金属。

Dr. William J. Evans, Department of Chemistry, University of California - Irvine, is supported by the Inorganic, Bioinorganic, and Organometallic Program of the Chemistry Division for research into the chemistry of organosamarium(II) and related complexes. The general objectives of the project are to identify and develop new types of chemistry and chemical transformations by exploring, defining, and exploiting the special properties of divalent samarium. Four areas of general importance will be investigated: carbon-carbon bond formation in hydrocarbon coupling processes, the insertion chemistry of oxygen-containing substrates, the chemistry of main group substrates containing element-element bonds, and the synthesis and reactivity of isolable, alkane-soluble carbocations. Metal compounds are used to facilitate many important chemical processes. However, there is a group of metals, called the lanthanides, whose chemistry is not well developed. Over the past few years tantalizing hints have appeared that indicate that samarium, one of the lanthanide elements, may possess heretofore unrecognized abilities to mediate chemical reactions. In this project the ability of a series of samarium compounds to activate hydrocarbons and to break and form bonds between carbon and other elements will be assessed. This will contribute to the discovery of new uses for samarium, which is an inexpensive metal readily available in the United States.