Element-Element and Related Bonding in the Earlier Main Group Elements

Philip P. Power博士，加州大学戴维斯分校化学系，受化学系无机、生物无机和有机金属化学项目的支持，研究早期主要族元素的元素间和相关键合。该项目的主要内容包括合成可能在较重的13族元素之间具有多个键的新型化合物，以及制备动力学稳定的金属-金属键主2族和12族元素衍生物，其中金属的正式氧化态为+1。新化合物的设计使它们包含以前未观察到的这些元素的键类型。通过使用各种光谱和结构方法来探测这些键的特征，以确定早期主基团原子之间元素-元素相互作用的性质。在化合物中发生的最重要的相互作用是将组成原子彼此连接起来的键合。对于碳原子和其他小的非金属原子来说，单键、双键和三键是众所周知的，正如化合物中的化学键与其化学性质之间的许多相互关系一样。直到几年前，人们还认为较重的原子只能形成单键。最近，这个教条被推翻了，这项研究的目的是探索那些不知道能形成多重键的原子实际上有可能形成多重键的可能性。这些研究对我们对化学键的基本认识具有重要意义，并为制备具有全新性质的新化学体系开辟了道路。

Dr. Philip P. Power, Chemistry Department, University of California - Davis, is supported by the Inorganic, Bioinorganic, and Organometallic Chemistry Program of the Chemistry Division to investigate element-element and related bonding in the earlier main group elements. The main thrust of the project involves the synthesis of new classes of compounds which may have multiple bonds between heavier group 13 elements and the preparation of kinetically stable, metal-metal bonded main group 2 and 12 element derivatives in which the metal has a formal oxidation state of +1. The new compounds are designed so they will contain bonding types not previously observed for these elements. By use of a variety of spectroscopic and structural methods the characteristics of these bonds will be probed in order to determine the nature of element-element interactions between the earlier main group atoms. The most important interactions which occurs in chemical compounds are the bonding which links the constituent atoms to one another. For carbon and other small non-metal atoms single, double, and triple bonds are well known, as are many correlations between the chemical bonding in a compound and its chemical properties. Up until only a few years ago, heavier atoms were thought to only form single bonds. More recently that dogma was overthrown and this study is aimed at exploring the possibility that atoms which are not known to form multiple bonds actually may be capable of doing so. These studies have great significance to our basic understanding of chemical bonding and open the way to the preparation of new chemical systems which may display entirely novel properties.