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首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >N-5(-) in Solution: Isotopic Labeling and Further Details of Its Synthesis by Phenyl Pentazole Reduction
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N-5(-) in Solution: Isotopic Labeling and Further Details of Its Synthesis by Phenyl Pentazole Reduction

机译：溶液中的N-5（ - ）：同位素标记及其通过苯基五唑的合成的进一步细节

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摘要

The cyclopentazolate anion, N-5(-), has been researched extensively over the years and detected in the gas phase more than a decade ago, but was only recently measured in solution. The process whereby aryl pentazole reduction leads to the production of N-5(-) is still not fully understood. Here, the production of N-5(-) in solution was investigated using isotopic labeling techniques while implementing changes to the synthesis methodologies. N-15 labeled phenyl pentazole produced appropriately labeled phenyl pentazole radical anions and N5- which, upon collision induced dissociation, produced the expected N-3(-) signals. Changing to higher purity solvent and less coated Na metal allowed for a much more rapid pace, with experiments taking less time. However, the best yields were obtained with heavily coated metal and much longer reaction times. Utilization of a vacuum line and ultrapure solvents led to no products being detected, indicating the importance of a sodium passivation layer in this reaction and the possibility that sodium is too strong a reducer. These findings can lead to better production methods of N-5(-) and also explain past failures in implementing aryl pentazole reduction techniques.
机译：环戊唑酸酯阴离子，N-5（ - ），多年来一直在广泛研究，并在气相中检测到十多年前，但最近在解决方案中测量。芳基五唑降低导致N-5（ - ）的产生的方法仍然不完全理解。这里，使用同位素标记技术研究了N-5（ - - ）在溶液中的产生，同位素标记技术，同时实施对合成方法的变化。 N-15标记的苯基五唑产生适当标记的苯基五唑基团阴离子和N5-在碰撞诱导的解离时，产生预期的N-3（ - ）信号。改变到更高的纯度溶剂和较少的涂层Na金属，允许更快速的速度，实验需要更少的时间。然而，用重涂覆的金属和更长的反应时间获得最佳产率。真空线和超纯度溶剂的利用导致未检测到产品，表明钠钝化层在该反应中的重要性以及钠的可能性太强的减速器。这些发现可以导致N-5（ - ）的更好的生产方法，也可以解释在实施芳基五唑减少技术方面的过去的故障。

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