Novel Metallaborane Chemistry

9311557密苏里大学圣彼得堡分校化学系劳伦斯·巴顿博士进行的巴顿研究在无机、生物无机化学和金属有机化学项目中，这一奖项得到了这一奖项的支持。工作将集中在合成簇合物，在簇合物中，六硼烷中的一个以上的桥氢原子被含有金属的部分取代。利用团簇展开法结合溴代硼烷阴离子的溴代消解，合成并表征了新型金属杂环七硼烷化合物。将制备五硼烷和六硼烷的锡衍生物，并将合成简单的锡基五硼烷低聚物。由于它们在有机金属催化中的用途，以及它们作为重要电子材料的前体的潜力，该项目的目标是扩大可以制备的金属硼烷的类型并确定它们的性质。%的氢化硼形成规则的小结构，其中一些含有5、6或7个硼原子和适当数量的氢原子。虽然已经有金属原子交换了硼的化合物形成了其他的硼氢化物，但金属硼烷在这些情况下还没有得到广泛的研究。巴顿博士将合成和研究新的五和六硼烷金属衍生物。他还将尝试形成这些物种的链，形成可能对微电子有用的陶瓷固体。***

9311557 Barton Research by Dr. Lawrence Barton of the Chemistry Department, University of Missouri-St. Louis, on metallaboranes is supported by this award in the Inorganic, Bioinorganic, and Organometallic Chemistry Program. Work will concentrate on synthesizing clusters in which more than one bridging hydrogen atom in hexaborane is replaced by a metal-containing moiety. Using cluster expansion methods combined with bromide elimination from bromoborane anions, novel metallaheptaboranes will be prepared and characterized. Tin derivatives of pentaborane and hexaborane will be prepared and oligomers of the simple stannylpentaboranes will be synthesized. Because of their usefulness in organometallic catalysis and their potential as precursors of electronically important materials, the goal of the project is to extend the types of metallaboranes which can be prepared and determine their properties. %%% Boron hydrides form in small regular structures, some of which contain 5, 6, or 7 boron atoms and an appropriate number of hydrogens. While compounds in which boron has been exchanged by a metal atom have been formed for other boron hydrides, metallaboranes have not been investigated extensively in these cases. Dr. Barton will synthesize and study new metal derivatives of penta- and hexa- boranes. He will also try to form chains of these species, forming solids which might be useful ceramics for microelectronics. ***