Research in Inorganic and Organometallic Chemistry

9313797棉花无机，生物无机和有机化学计划的这项资助支持了F。得克萨斯州农工大学化学系的阿尔伯特·科顿对过渡金属的金属-金属多重键合的性质进行了研究。 含有多键合的钌和锇的化合物是众所周知的，但在这些研究中，一些不寻常的化合物将被合成和表征。 通过合成含V、Nb、Ta、Fe、Ir和Pt的物质，将扩展多重键化学的范围。 对于一些更常见的金属与这种类型的键合（Os，W，Re，Pt），在更高的氧化态的新化合物将进行研究。 此外，金属-金属二聚体的配体笼的范围内的内部运动将进行研究。 也要制备低聚和聚合化合物，其中金属金属二聚体单元通过含π电子的物质连接，以便探测沿着链或在片内的磁性和电子相互作用. 在含有两个彼此键合的过渡金属的二聚化合物中，有时观察到三键和四键。 这项研究的目的是测试这种类型的键合是否可能与某些金属或金属在更高的氧化态，它以前没有被观察到。 该领域的研究有助于对有机金属簇分子中的成键和反应性的基本了解，这些分子被发现在催化有机反应中非常重要。 此外，了解这种类型的化合物有助于了解某些类型的固态电子和光学器件以及一些潜在的抗肿瘤药物。

9313797 Cotton This grant in the Inorganic, Bioinorganic, and Organometallic Chemistry Program supports research by Dr. F. Albert Cotton of the Chemistry Department, Texas A&M University, into the nature of metal-metal multiple bonding by transition metals. Compounds containing multiply bonded ruthenium and osmium are well known, but in these investigations some unusual compounds will be synthesized and characterized. The scope of multiple bond chemistry will be extended by synthesis of species containing V, Nb, Ta, Fe, Ir and Pt. For some of the metals more commonly associated with this type of bonding (Os, W, Re, Pt), new compounds in higher oxidation states will be investigated. In addition, the internal movement of metal-metal dimers within the confines of the ligand cage will be studied. Also to be prepared are oligomeric and polymeric compounds in which metal metal dimer units are linked by pi- electron containing species, in order to probe the magnetic and electronic interactions along the chain or within a sheet. In dimeric compounds which contain two transition metals bonded to each other, triple and quadruple bonds are sometimes observed. The goal of this research is to test whether this type of bonding is possible with certain metals or metals in higher oxidation states for which it has not previously been observed. Research in this area contributes to the basic understanding of bonding and reactivity in organometallic cluster molecules, which have been found to be important in catalyzing organic reactions. Additionally, understanding compounds of this type contributes to knowledge of some types of solid-state electronic and optical devices and some potential anti-tumor agents.