Phosphorus-Capped Metal Clusters: Molecular Building-Blocks for Extended Assemblies

该奖项授予北卡罗来纳大学教堂山分校化学系的Cynthia K.Schauer博士，该奖项为无机、生物无机和有机金属计划提供支持，用于合成小金属-磷簇合物的线性低聚物。这些原子簇一般包含五个铁和磷的原子骨架，带有羰基配体。各种合成策略将被用来形成金属桥链、磷-磷桥链和有机基团桥链。当氢或三烷基硅基从磷原子上被移除时，这些反应利用了磷原子上的反应性。低聚物的性质和反应性将被研究，目的是为聚合链的反应性提供模型。还将尝试合成含磷立方烷的较长链状物种或链。本研究试图找到构建含磷和金属的线性链的合成方法。该项目是一个综合性的挑战，关系到根本利益。实用性可能在于较短的链，因此更容易表征的分子揭示了由相同连接单元构建的较长链聚合物的性质。这些化合物或其类似物可能具有有趣的电子性质。

This award in the Inorganic, Bioinorganic, and Organometallic Program provides support to Dr. Cynthia K. Schauer of the Chemistry Department, University of North Carolina at Chapel Hill, for synthesis of linear oligomers of small metal-phosphorus clusters. The clusters generally contain five atom frameworks of iron and phosphorus with carbonyl ligands. A variety of synthetic strategies will be used to form metal bridged, phosphorus-phosphorus bridged, and organic group bridged chains. The reactions take advantage of the reactivity at the phosphorus atom when hydrogen or trialkylsilyl groups are removed from that site. The properties and reactivities of the resulting oligomers will be investigated, with the goal of providing models for the reactivity of polymeric chains. Synthesis of longer chained species or chains containing phosphorus cubanes will also be attempted. %%% This study attempts to find synthetic procedures for the construction of linear chains containing phosphorus and metals. The project is a synthetic challenge and is of fundamental interest. Utility may lie in the extent to which shorter chain, and therefore more easily characterized, molecules reveal the properties of longer chain polymers built from the same connecting units. It is possible that these compounds or their analogues may have interesting electronic properties.