Higher-order Homo and Heteronuclear Multiple Bonding Involving Main Group Elements

Philip P. Power博士，加州大学戴维斯分校化学系，在无机、生物无机和有机金属化学项目的支持下，研究涉及较重的13族和14族元素的同核和异核多键，以及制备含有金属-金属键的低价2族配合物。邻terphenyl和相关配体将被用来稳定13和14族元素在低配位环境中形成多键。这两个系列中较重的成员彼此之间以及与其他杂原子之间的多重键的能力将通过一系列物理技术进行探索，包括x射线衍射，多核和动态核磁共振，紫外可见，红外和epr光谱。terphenyl配体将类似地与2族金属一起构建能够形成这些元素的第一个金属-金属键配合物的物质。元素化学键的性质问题是化学中最基本的问题之一。这个项目将探索铝、镓、铟、锗和锡形成双键或三键的能力。一般来说，这些元素倾向于单键，但在某些情况下可以诱导参与多键。此外，将寻求第一个直接的铍-铍和相关的镁-镁物种。这项研究的结果将确定这些元素可以形成的化合物的种类，并将有助于设计催化剂或基于它们的先进材料。¥©Á <e:1> Á¢╣À ？ Á À│/¥/% '¢¥¢？0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00¥©现代

Dr. Philip P. Power, Chemistry Department, University of California - Davis, is supported by the Inorganic, Bioinorganic, and Organometallic Chemistry Program, to study homo- and heteronuclear multiple bonding involving heavier group 13 and 14 elements and for the preparation of low valent group 2 complexes that contain metal-metal bonds. The ortho-terphenyl and related ligands will be utilized to stabilize group 13 and 14 elements in low coordinate environments which are amenable to the formation of multiple bonds. The ability of the heavier members of these two series to multiply bond with one another and with other heteroatoms will be explored by a range of physical techniques including x-ray diffraction, multinuclear and dynamic nmr, uv-visible, infrared, and epr spectroscopies. The terphenyl ligands will be similarly employed with the group 2 metals to construct species capable of forming the first metal-metal bonded complexes of these elements. The question of the nature of an element's chemical bonds is one of the most basic in chemistry. This project will probe the ability of aluminum, gallium, indium, germanium, and tin to form double or triple bonds. In general these elements prefer single bonds, but in some cases can be induced to participate in multiple bonding. In addition, the first direct beryllium-beryllium and related magnesium-magnesium species will be sought. The results of the study will define the sorts of compounds these elements can form and will contribute to the design of, e.g., catalysts or advanced materials that are based on them. ¥©Á ┤Á¢╣À ? Á À │/¥/%`¢¥¢ ?╝ /┤└/│Á┤ _/¥Á╝╣/%¢ ¥©/¥ /╝Á ▓/¢Á┤ ? ¥©Á_