Research in Inorganic and Organometallic Chemistry

9313797棉花：无机、生物无机和有机金属化学项目的拨款支持德克萨斯农工大学化学系F. Albert Cotton博士对过渡金属的金属-金属多键性质的研究。含有多键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。多键化学的范围将通过合成含有V， Nb, Ta, Fe， Ir和Pt的物质而扩大。对于一些与这种类型的键结合更常见的金属（Os， W, Re, Pt），将研究更高氧化态的新化合物。此外，还将研究金属-金属二聚体在配体笼内的内部运动。还将制备低聚物和聚合物化合物，其中金属二聚体单元由含有pi-电子的物质连接，以便探测沿链或片内的磁性和电子相互作用。在含有两个相互连接的过渡金属的二聚体化合物中，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是否可能与某些金属或金属在更高的氧化态，这是以前没有观察到的。这一领域的研究有助于人们对有机金属簇分子的键合和反应性有基本的了解，这些分子在催化有机反应中起着重要的作用。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剂。

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.