Carbene Reactivity in Pure and Mixed Molecular Crystals

建议：9320619摘要日期：10/27/93 PI：加西亚-加拉贝加州大学。洛杉矶将对有机分子晶体中苯基-烷基卡宾衍生物的化学进行系统的研究。卡宾是由苯基烷基重氮化合物挤出分子氮，以热和光化学的方式在固体中生成的。这项研究将包括纯晶体固体和混合分子晶体，并将结合光化学、固态化学和材料科学的技术。产品研究和反应速度将作为晶体和分子结构的函数进行跟踪，这将由X射线晶体分析确定。将寻求晶体和分子结构特征与产品选择性和专一性的相关性。体磁性质将被测量以确定是否发生有序的自旋-自旋相互作用，这将导致铁磁行为。来自有机动力学项目的这笔赠款支持加州大学洛杉矶分校的米格尔·加西亚-加拉贝教授的工作。卡宾是二价物种，而不是通常的四价碳分子，将在固态下进行研究。通过从前体分子中挤出分子氮，通过热照射和光照射将产生各种卡宾。这些前体分子的晶体结构将通过X射线晶体分析来确定，这些反应的产物和速率将与晶体和分子结构相关联。这些研究将为卡宾化学和固态化学提供见解。

Proposal: 9320619 ABSTRACT Date: 10/27/93 PI: Garcia-Garabay U. Cal. Los Angeles A systematic investigation of the chemistry of phenyl-alkyl carbene derivatives in organic molecular crystals will be made. Carbenes will be generated in the solid state both thermally and photochemically by the extrusion of molecular nitrogen from phenyl alkyl diazo compounds. The study will include pure crystalline solids and mixed molecular crystals, and will combine techniques from photochemistry, solid state chemistry, and material science. Product studies and rates of reactions will be followed as a function of crystal and molecular structures, which will be determined by X-ray crystallographic analyses. Correlations will be sought for crystal and molecular structural features with product selectivity and specificity. Bulk magnetic properties will be measured to determine if ordered spin- spin interactions occur, which would lead to ferromagnetic behavior. This grant from the Organic Dynamics Program supports the work of Professor Miguel Garcia-Garabay at the University of California, Los Angeles. Carbenes, which are divalent species rather than the usual tetravalent carbon molecules, will be studied in the solid state. Various carbenes will be produced both thermally and by light irradiation by the extrusion of molecular nitrogen from precursor molecules. Crystal structures of these precursor molecules will be determined by X-ray crystallographic analysis and the products and rates of these reactions will be correlated with the crystal and molecular structure. These studies will provide insight to carbene chemistry and solid state chemistry.