Multiple Bonds in Ordered Assemblies

这个奖项由无机，生物无机和有机化学计划支持的研究教授马尔科姆H。奇泽姆在俄亥俄州州立大学研究了钼和钨的双核化学的两个方面：1）腈，炔和二氮中的多重键在它们与具有M-M多重键的化合物反应中的活化，和2）含有M-M多重键的二聚体，环四聚体和介晶的连接二聚体的制备和表征。 特别强调的是建立控制复分解反应的动力学和热力学因素，在该复分解反应中，双核配合物和那些在腈，炔和二氮之间交换多个键。 在第二个项目中，特别注意的是与桥接羧酸酯接头的双核化合物。 将制备单电子氧化和还原物质，并通过epr光谱进行检查，以评估电子离域。 将通过磁共振研究掺杂有顺磁性复合物的双核复合物的热致中间相，以建立柱状相的排列和顺磁性位点的定位或离域。 具有两个金属原子的络合物将被研究其与具有多重键的小分子的反应性以及其形成新型超分子和材料的能力。

This award by the Inorganic, Bioinorganic and Organometallic Chemistry program supports research by Professor Malcolm H. Chisholm at the Ohio State University to investigate two aspects of the dinuclear chemistry of molybdenum and tungsten: 1) The activation of multiple bonds in nitriles, alkynes and dinitrogen in their reactions with compounds having M-M multiple bonds, and 2) The preparation and characterization of linked dimers of dimers, cyclotetramers and mesogens containing M-M multiple bonds. Particular emphasis is given to establishing the kinetic and thermodynamic factors that control the metathesis reactions in which multiple bonds are exchanged between dinuclear complexes and those in nitriles, alkynes and dinitrogen. In the second project specific attention is given to dinuclear compounds with bridging carboxylate linkers. Single electron oxidized and reduced species will be prepared and examined by epr spectroscopy to evaluate the electron delocalization. The thermotropic mesophases of the dinuclear complexes doped with paramagnetic complexes will be studied by magnetic resonance in order to establish the alignment of the columnar phase and he localization or delocalization of the paramagnetic site. Complexes with two metal atoms will be investigated for their reactivity with small molecules with multiple bonds and for their ability to form novel supramolecules and materials.