Small Molecule Activation and Materials Synthesis

康奈尔大学的沃尔赞斯基教授将进行 前过渡金属氧代和氮化物研究 化合物的资金来自无机，生物无机，和 组织者方案。 在研究的一个阶段，他将 小分子低配位活化研究 亲电金属中心如锆和钛 大体积硬π供体的化合物。 这些反应 与烷烃，烯烃和芳烃的化合物将被研究， 其裂解C-H和C-C键的能力。 另一相 的工作将针对准备新的材料， 使用前过渡金属络合物作为前体。 这些 前体将具有强的π供体配体 和酰胺。 预计使用这些前体 可以合成更复杂的材料 比通过常规高温方法获得的那些高。 %%% 一类早期过渡金属分子的化学 通过氮原子和氧原子形成的键 研究有两个原因。 一是这些化合物显示 与其他化学品中的C-C和C-H键具有不寻常和独特的反应性， 分子。 另一个是它们可以作为分子 高分子材料合成中的前体 复杂性 希望这些研究将导致 控制烃反应性的改进方法 and of designing设计interesting有趣material材料.

Professor Wolczanski of Cornell University will conduct investigations of early transition metal oxo and nitrido compounds with funding from the Inorganic, Bioinorganic, and Organometallic Program. In one phase of the studies he will investigate small molecule activation by low-coordinate electrophilic metal centers such as zirconium and titanium compounds of bulky hard pi donors. Reactions of these compounds with alkanes, alkenes, and arenes will be studied for their ability to cleave the C-H and C-C bonds. The other phase of the work will be directed towards preparing new materials by use of early transition metal complexes as precursors. These precursors will have strong pi donor ligands such as nitrides and amides. It is anticipated that use of these precursors will enable the synthesis of materials that are more complex than those obtained by conventional high-temperature methods. %%% The chemistry of a class of early transition metal molecules that have bonds through nitrogen and oxygen atoms will be studied for two reasons. One is that these compounds display unusual and unique reactivity with C-C and C-H bonds in other molecules. The other is that they can be used as molecular precursors in the synthesis of novel materials of high complexity. It is hoped that these studies will lead to improved methods of controlling the reactivity of hydrocarbons and of designing interesting materials.