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Small Molecule Activation and Materials Synthesis

小分子活化与材料合成

基本信息

批准号：
9218270
负责人：
Peter Wolczanski
金额：
$ 48万
依托单位：
Cornell University
依托单位国家：
美国
项目类别：
Continuing Grant
财政年份：
1993
资助国家：
美国
起止时间：
1993-02-01 至 1996-01-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=9218270&HistoricalAwards=false
关键词：
Small Molecule Activation Materials Synthesis

项目摘要

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.

康奈尔大学的Wolczanski教授将在无机、生物无机和有机金属项目的资助下，对早期过渡金属氧和硝基化合物进行研究。在研究的一个阶段，他将研究低配位亲电金属中心对小分子的激活作用，如大体积硬pi供体的锆和钛化合物。将研究这些化合物与烷烃、烯烃和芳烃的反应，以了解它们裂解C-H和C-C键的能力。这项工作的另一阶段将致力于通过使用早期过渡金属络合物作为前体来制备新材料。这些前体将具有强大的圆周率供体配体，如氮化物和酰胺。预计使用这些前驱体将能够合成比传统高温方法获得的材料更复杂的材料。研究一类通过氮和氧原子成键的早期过渡金属分子的化学有两个原因。其一是这些化合物与其他分子中的C-C和C-H键表现出不同寻常和独特的反应活性。二是它们可以作为分子前驱体用于合成高复杂性的新材料。希望这些研究将导致改进控制碳氢化合物反应性和设计有趣材料的方法。