Bond-forming Reactions of Gas-phase Molecular Dications
Bond-forming Reactions of Gas-phase Molecular Dications
复制标题
气相分子阳离子的成键反应
DOI：
10.1021/ja00098a030
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发表时间：
1994
影响因子：
15
通讯作者：
S. Leone
中科院分区：
文献类型：
--
作者：
S. Price;M. Manning;S. Leone
我们在综合研究八种二价化合物 CF2+、CF22+、CF32+、SF42+、SF32+、SF22+、C022+ 和 OCS2+ 与中性碰撞伙伴 Xe、D2、O2、N2、NO 和 CO 的反应性时观察到一系列涉及化学键形成的新反应。这些反应在交叉光束中检测到 实验室框架碰撞能量在 30 至 50 eV 之间的设备。质量选择的双离子束与碰撞区域中的中性反应物的脉冲束相互作用，并且离子产物由飞行时间质谱仪监测。每个系统的主要反应是电荷转移过程。然而，对于所研究的几个碰撞系统来说，涉及形成新化学键的反应对离子产率（1-20%）有显着贡献。观察到两类成键反应，一类涉及负离子转移到阳离子，另一类涉及正离子从阳离子转移到中性反应物。前者的一个例子是CF22+和D2反应生成DCF2+；后者的一个例子是 XeF+ 的反应产生
We observe a series of novel reactions involving the formation of chemical bonds in a comprehensive study of the reactivityof eight dications, CF2+, CF22+, CF32+, SF42+, SF32+, SF22+, C022+, and OCS2+, with the neutral collision partners Xe, D2, 02, N2, NO, and CO. The reactions are detected in a crossed beam apparatus at laboratory-frame collision energies between 30 and 50 eV. The mass-selected dication beam interacts with a pulsed beam of the neutral reactant in a collision region and the ionic products are monitored by a time-of-flight mass spectrometer. The major reactions for each system are charge transfer processes. However, reactions involving the formationof new chemical bonds contribute significantly to the ionyield (1-20%) for several of the collision systems studied. Two classes of bond-forming reactions are observed, one involving negative ion transfer to the dication and the other involving positive ion transfer from the dication to the neutral reactant. An example of the former is the production of DCF2+ from the reaction between CF22+ and D2; an example of the latter is the production of XeF+ from the reaction between