An Isotopic Probe into Bonding Changes due to Electron Addition

有机动力学计划将支持杰拉尔德·R·史蒂文森教授在伊利诺伊州立大学化学系进行的“电子加成引起的成键变化的同位素探针”的研究。为了对芳香性的本质产生新的探索，人们正在获得热力学同位素效应。核磁共振光谱、电子自旋共振光谱和量热技术正在被用来测量控制从还原的环烯阴离子自由基或二阴离子到中性环烯和过氚化中性环烯的一个和两个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时芳香性的变化有关。这些数据将对芳香性的本质产生新的探索。该“探头”将在其他高芳香族环烯系统上进行试验。

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.