Novel Metallaborane Chemistry

9311557巴顿密苏里-圣路易斯大学化学系的劳伦斯巴顿博士对金属硼烷的研究得到了无机，生物无机和有机化学计划的该奖项的支持。 工作将集中在合成簇，其中一个以上的桥氢原子在六硼烷被取代的含金属的部分。 利用团簇扩展方法结合溴硼烷阴离子的溴消除，将制备和表征新型金属七硼烷。 将制备戊硼烷和己硼烷的锡衍生物，并合成简单的锡基戊硼烷的低聚物。 由于它们在有机金属催化中的用途及其作为电子重要材料前体的潜力，该项目的目标是扩大可以制备的金属硼烷的类型并确定其性质。 硼以小的规则结构形成，其中一些包含5、6或7个硼原子和适当数量的氢。 虽然已经形成了其中硼已经被金属原子交换的化合物用于其他硼氢化物，但在这些情况下金属硼烷尚未被广泛研究。 巴顿博士将合成和研究五硼烷和六硼烷的新金属衍生物。 他还将尝试形成这些物种的链，形成可能是微电子学有用陶瓷的固体。 ***

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. ***