Superreduced Compounds of the Early Transition Metals

将开发在有机金属合成中使用单环芳烃自由基阴离子的方法，如苯、甲苯和均三甲苯的阴离子。这些都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低价芳烃络合物。最近在该实验室获得的各种零价族4羰基为探索这些元素在以前未知的氧化状态下的化学提供了机会。目标是探索这些化合物以及类似的第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用作有用的试剂。这项研究可能扩展到3族元素Sc、Y和Lu，目前尚不知道其是否存在羰基，这将是这项研究的重要组成部分。在化学部的无机、生物无机和有机金属项目中，明尼苏达大学的John E.Ellis博士将继续开发在高度还原的氧化态下制备早期过渡金属的方法。我们将探索这些化合物的化学、电化学和结构性质。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.