Superreduced Compounds of the Early Transition Metals

将开发利用单环芳烃自由基阴离子，如苯、甲苯和三甲基的阴离子在有机金属合成中的应用方法。这些是非常有效的还原剂，能够将所有已知的d和f嵌段过渡金属离子转化为零价或更低价的芳烃配合物。这个实验室最近发现了多种零价4基羰基，这为探索这些元素在以前未知氧化态下的化学性质提供了机会。目的是探索这些化合物以及类似的5族羰基的化学、电化学和结构性质，并确定这些新材料是否将在无机、有机金属或有机合成中成为有用的试剂。这项研究的可能扩展到3族元素Sc， Y和Lu，目前没有羰基已知，将是研究的重要组成部分。在化学学部无机、生物无机和有机金属项目中，明尼苏达大学的John E. Ellis博士将继续研究制备高度还原氧化态的早期过渡金属的方法。这些化合物的化学、电化学和结构性质将被探讨。这些高度还原的金属离子可能在无机、有机金属和有机合成中被证明是有用的试剂。

Methods for the use of monocyclic arene radical anions, such as those of benzene, toluene, and mesitylene, in organometallic synthesis will be developed. These are extraordinarily potent reductants, which are capable of converting all known d- and f-block transition metal ions to zero or lower valent arene complexes. The recent availability in this laboratory of a variety of zerovalent group 4 carbonyls provides an opportunity to explore the chemistry of these elements in previously unknown oxidation states. The objectives will be to explore the chemical, electrochemical, and structural properties of these compounds as well as analogous group 5 carbonyls and to determine whether these new materials will be useful reagents in inorganic, organometallic, or organic synthesis. Possible extension of this research to the group 3 elements Sc, Y, and Lu, for which no carbonyls are presently known, will be an important component of the research. %%% In this project in the Inorganic, Bioinorganic, and Organo- metallic Program of the Chemistry Division, Dr. John E. Ellis of the University of Minnesota will continue to develop methods for the preparation of early transition metals in highly reduced oxidation states. The chemical, electrochemical, and structural properties of these compounds will be explored. These highly reduced metal ions may prove to be useful reagents in inorganic, organometallic, and organic synthesis.