Ordered Arrays of Metals with Polynitrile or Cyanide Ligands

该奖项在无机，生物无机和有机化学 该计划为合成研究提供支持 有机腈桥过渡金属化合物，Kim R.邓巴 密歇根州立大学化学系。 链条，分层， 将构建和结晶三维组件， 它们的磁性和导电性能被确定。 乙腈 化合物经历容易的取代反应， 可以加入配体以调节性能。 延长的溶解度 阵列将通过改变金属前体上的电荷， 有机基团上的取代基，以及存在于 扩展网络。 化合物将有两种主要类型。 一种类型的 化合物将含有与氮原子σ键合的过渡金属 孤对聚腈受体。 四氰基乙烯等物质 （TCNE）将被使用。 在这些系统中，顺磁性金属中心是 组装成有机自由基网络。 第二类化合物 由过渡金属氰化物络合物组成， 铁磁或亚铁磁耦合链阵列或二维 网络. 本研究将对过渡金属腈化合物的合成进行研究， 可以控制一维、二维或三维的纯晶体 将形成数组。 预计这些阵列将表现出不寻常的 磁性能将能够与结构相关， 安排 通过操纵附着在金属上的有机基团， 将控制化合物的溶解度 特定类型的分子排列和晶体生长。

This award in the Inorganic, Bioinorganic, and Organometallic Chemistry Program provides support for research on synthesis of organonitrile-bridged transition metal compounds by Dr. Kim R. Dunbar of the Chemistry Department, Michigan State University. Chain, layered and three-dimensional assemblies will be constructed and crystallized, and their magnetic and conducting properties determined. Acetonitrile compounds undergo facile substitution reactions so that a variety of ligands can be added to moderate properties. Solubility for extended arrays will be enhanced by varying charge on metal precursors, varying substituents on organic groups, and varying outer sphere ions present in extended networks. Compounds will be of two main types. One type of compound will contain transition metals sigma-bonded to the nitrogen atom lone pairs of polynitrile acceptors. Species such as tetracyanoethylene (TCNE) will be used. In these systems, paramagnetic metal centers are assembled into the organic radical network. The second type of compound consists of transition metal cyanide complexes reacted to form extended arrays of ferro- or ferrimangnetically coupled chains or two-dimensional networks. In this research, synthesis of transition metal nitrile compounds will be controlled so that pure crystals of one-, two-, or three-dimensional arrays will be formed. The arrays are expected to exhibit unusual magnetic properties which will be able to be correlated with structural arrangement. By manipulating the organic groups attached to the metals, the solubility of the compounds will be controlled in order to build specific types of molecular arrangements and crystal growth.