Low Coordination Number/Low Oxidation State Main Group Chemistry

在这项由无机，生物无机和 有机化学程序，艾伦H。考利的 得克萨斯大学奥斯汀分校将调查三个领域， 主族元素化学：（a）元素含量异常低 氧化态，（B）配位异常低的元素 数，和（c）聚合物材料结合主组 元素预计前两个领域将产生新的 具有不寻常的反应性和性质的化合物。 在第三个项目中产生的聚合物同样是 新材料具有有趣和潜在的用途 特性. 将开发新的配体， 协调能力，旨在稳定主要群体 低氧化态的元素，如磷（+1）， 砷（+1）、锑（+1）、铋（+1）、镓（+1）和 铝（+1）。在第二个领域，类似物的合成 将尝试过渡金属亚烷基和亚烷基炔 与第14族（例如，硅和锗）和第15族（对于 例如，磷和砷）元素取代了 键合碳，以产生具有过渡金属的化合物， 主族元素多重键。有针对性的过渡 使用的金属是钼、钨、铌、NiO- 锆和铪。这些化合物将被... 胺化的反应类似于过渡金属 亚烷基和亚烷基炔，包括聚合 反应.

In this research supported by the Inorganic, Bioinorganic and Organometallic Chemistry Program, Alan H. Cowley of the University of Texas at Austin will investigate three areas of main group element chemistry: (a) elements in unusually low oxidation state, (b) elements with unusually low coordination number, and (c) polymeric materials incorporating main group elements. The first two areas are expected to generate new chemical compounds with unusual reactivities and properties. The polymers generated in the third project would likewise be new materials with interesting and potentially useful properties. New ligands will be developed that will have supplemental coordination capacity and be designed to stabilize main group elements in low oxidation state, such as phosphorus(+1), arsenic(+1), antimony(+1), bismuth(+1), gallium(+1) and aluminum(+1). In the second area, syntheses of analogues of transition metal alkylidenes and alkylidynes will be attempted with group 14 (for example, silicon and germanium) and 15 (for example, phosphorus and arsenic) elements replacing the multiply bonded carbon to produce compounds with transition metal to main group element multiple bonds. The targeted transition metals to be employed are molybdenum, tungsten, rhenium, nio- bium, zirconium and hafnium. These compounds will then be ex- amined for reactivities similar to the transition metal alkylidenes and alkylidynes, which include polymerization reactions.