Synthetic, Structural, and Mechanistic Studies of Monomeric Alkyl, Hydride, Sub-Valent, and Multiply Bonded Derivatives of the s-and p-Block Elements

该奖项在无机，生物无机和有机化学 该计划支持Gerard F博士对主族化合物的研究。R. 哥伦比亚大学化学系的帕金说。 合成的， 将进行结构、机理和热力学研究， 提供对主要群体的全面和基本的了解 (e.g., Al，Ga，Ge，In，Sn，Tl）配合物的研究进展 应用. 重点将放在金属烷基和 金属-硫属化合物配合物和金属-主族的能量学 多重债券 一系列新的，结构类似的化合物将 使用空间控制配体制备。 使用的配体 包括聚（吡唑基）硼氢化物、三（咪唑基）膦， 四氮杂（14）轮烯。 所创造的空间环境将能够 支持单体烷基，氢化物，硫族化物，低价，和 多重键合的硫属化物和磷属化物衍生物。 硫属元素S，Se， 和Te包括在研究中;磷族元素包括P和Bi。 主族元素的络合物可用作合成的前体， 陶瓷材料、半导体和超导体。 比如说， 二元II-VI族硫属化物（例如，ZnSe和ZnTe）和III-V族磷属元素化物 (eg., GaAs和InP）用于光伏能量转换器件， 发光二极管、固态激光器和光开关。 陶瓷 以及由硫属化物和磷属化物形成的多孔固态材料 也在使用中。 在这项研究中，新的分子化合物的控制 结构将被制备和表征，以便更好地能够 将这些化合物的化学性质与 包含它们的材料。

This award in the Inorganic, Bioinorganic, and Organometallic Chemistry Program supports research on main group compounds by Dr. Gerard F. R. Parkin of the Chemistry Department, Columbia University. Synthetic, structural, mechanistic and thermodynamic studies will be undertaken to provide a comprehensive and fundamental understanding of main group (e.g., Al, Ga, Ge, In, Sn, Tl) complexes and their potential applications. Emphasis will be placed on metal-alkyl and metal-chalcogenide complexes and on the energetics of metal-main group multiple bonds. A series of new, structurally analogous compounds will be prepared using sterically-controlling ligands. The ligands to be used include poly(pyrazolyl)hydroborate, tris(imidazolyl)phosphine, and tetraaza(14)annulene. The steric environments created will be capable of supporting monomeric alkyl, hydride, chalcogenolate, subvalent, and multiply bonded chalcogenide and pnictide derivatives. Chalcogens S, Se, and Te are included in the study; pnictogens include P and Bi. Complexes of main group elements find application as precursors for ceramic materials, semiconductors, and superconductors. For example, binary II-VI chalcogenides (e.g., ZnSe and ZnTe) and III-V pnictides (eg., GaAs and InP) are used in photovoltaic energy conversion devices, light-emiting diodes, solid-state lasers and optical switches. Ceramics and porous solid state materials formed from chalcogenides and pnictides are also in use. In this study, new molecular compounds of controlled structure will be prepared and characterized in order to better be able to correlate the chemistry of these compounds with the properties of materials containing them.