An Isotopic Probe into Bonding Changes due to Electron Addition

有机动力学项目将支持伊利诺伊州立大学化学系Gerald R. Stevenson教授的“电子加成引起的键合变化的同位素探测”研究。热力学同位素效应是为了产生一个新的探索芳香性的性质。利用核磁共振波谱、电子自旋共振波谱和量热技术测量了从还原环烯阴离子自由基或阴离子到中性环烯和过氘化中性环烯的一、二次电子转移反应的热力学参数。由此产生的热力学同位素效应将与环烯在一个或两个电子加成后芳香族性质的变化有关。这些数据将对芳香性的本质产生新的探索。该“探针”将在其他同芳香环烯体系上进行试验。

The Organic Dynamics Program will support Professor Gerald R. Stevenson's study of "An Isotopic Probe into Bonding Changes due to Electron Addition" in the Chemistry Department at Illinois State University. Thermodynamic isotope effects are being obtained in order to generate a new probe into the nature of aromaticity. Nuclear magnetic resonance spectroscopy, electron spin resonance spectroscopy, and calorimetric techniques are being used to measure the thermodynamic parameters controlling one and two electron transfer reactions from reduced annulene anion radicals or dianions to neutral annulenes and perdeuteriated neutral annulenes. The resulting thermodynamic isotope effects will be related to changes in the aromatic nature of annulenes upon one or two electron addition. These data will generate a new probe into the nature of aromaticity. The "probe" will be tried on other homoaromatic annulene systems.