The Chemistry of Organosamarium (II) and Related Complexes

威廉·埃文斯博士，化学系，大学 加州欧文，是由无机，生物无机，和 化学部的有机化学计划，以定义和 发展新型化学和化学转化， 有机钐（II）及其配合物的特殊性质。的 该项目的总体目标是扩大镧系元素的限制 化学和开发新的反应和试剂。利用 四面体反应腔存在于十甲基钐中，大小 选择性烃反应，如C-H金属化、C-C偶联和 将开发其它新的反应。使用的还原能力 Sm（II），能量高达215 kJ/mol的主基-碳键可以 被劈开这一特性将被用来生产不寻常的化合物 包含主群集群。这些研究将扩展到 各种额外的Sm（II）物种，以系统化 这种氧化态的化学性质。 金属化合物被用来实现许多化学转变。而 许多金属的重要性已经得到很好的证实， 组，称为镧系元素，其化学不发达， 尽管一些重要行为的诱人暗示已经出现， 过去几年在这个项目中，一系列钐的能力， 化合物，以活化碳氢化合物，并打破碳之间的键， 将评估其他因素。这将有助于全面 对镧系金属的理解和新用途的发现 钐是一种廉价的金属， 美国的

Dr. William J. Evans, Chemistry Department, University of Califonia-Irvine, is supported by the Inorganic, Bioinorganic, and Organometallic Chemistry Program of the Chemistry Division to define and develop new types of chemistry and chemical transformations which exploit the special properties of organosamarium(II) and related complexes. The project's general purpose will be to expand the limits of lanthanide chemistry and to develop new reaction and reagents. By utilizing the tetrahedral reaction cavity which exists in decamethylsamarocene, size selective hydrocarbon reactions such as C-H metalations, C-C coupling and other novel reactions will be developed. Using the reducing power of Sm(II), main group-carbon bonds with energies as high as 215 kJ/mol can be cleaved. This property will be utilized to produce unusual compounds containing main group clusters. These studies will then be extended to a variety of additional Sm(II) species in order to systematize the chemistry of this oxidation state. Metal compounds are used to effect many chemical transformations. While the importance of many metals has been well established, there is a group, called the lanthanides, whose chemistry is not well developed, even though tantalizing hints of important behaviors have emerged over the past few years. In this project the ability of a series of samarium compounds to activate hydrocarbons and to break bonds between carbon and other elements will be assessed. This will contribute both to the overall understanding of the lanthanide metals and to the discovery of new uses for samarium, which is an inexpensive metal readily available in the United States.