Gas-Phase Ion Chemistry with a Selected Ion Flow Tube - Triple Quadrupole

这项有机动力学计划的拨款支持普渡大学罗伯特·斯奎尔斯博士的研究。Squires博士将完成流动余辉选择离子流管三重四极杆（FA-SIFT-TQ）装置的开发，这将是气相离子研究的强大新工具。随着仪器的完成，他将获得有关气相离子的结构、性质和反应性的新的基本信息。我们将研究几个感兴趣的系统。碰撞活化羧酸盐生成气相碳离子的新方法将为研究稳定的烷基阴离子和β -取代乙基阴离子、通过阈值测量确定碳离子的热化学性质以及研究乙烯基和环丙基阴离子的构型稳定性提供基础。高价二元氢化物阴离子将被探索，特别强调的性质，反应性和流动行为的硅和硼氢化物。生成硅取代的碳离子，并测定其结构和稳定性。反应性有机中间体（如酰基烷、环烷基基烯和羰基）的热化学数据将通过活化方法确定。这种气相离子的研究结果在化学和物理的许多领域都具有广泛的意义。

This grant in the Organic Dynamics Program supports the research of Dr. Robert Squires at Purdue University. Dr. Squires will complete the development of a Flowing Afterglow-Selected Ion Flow Tube-Triple Quadrupole(FA-SIFT-TQ) apparatus which will be a powerful new tool for gas-phase ion studies. With the completion of the apparatus he will obtain new fundamental information about the structures, properties and reactivity of gas-phase ions. Several systems of interest will be studied. A new method for generating gas phase carbanions from collisionally activated carboxylates will provide the basis for studying stable alkyl anions and beta-substituted ethyl anions, for determining carbanion thermochemistry from threshold measurements and for investigating the configurational stabilities of vinyl and cyclopropyl anions. Hypervalent binary hydride anions will be explored with particular emphasis on the properties, reactivity and fluxional behavior of silicon and boron hydrides. Silicon-substituted carbenium ions will be generated and their structures and stabilities determined. Thermochemical data for reactive organic intermediates such as ylides, cycloalkenylidenes and carbenes will be determined by activation methods. The results of this gas-phase ion research should have broad significance in many areas of chemistry and physics.