Synthesis and Redox Chemistry of Tetrachalcogenotetraasteranes

Glass教授将领导一个合作项目，涉及Potapov教授（俄罗斯伊尔库茨克）和Glass教授（美国亚利桑那州图森）的研究小组，研究四烃基四甾烷（硫，硒和碲）的合成和氧化还原化学。这些“星形”分子的合成是基于1，4-二硫代配基的光二聚作用。这些材料的氧化将使用循环伏安法和化学氧化剂的电化学技术进行研究。这些化合物的单电子氧化可以提供具有新颖结构的稳定的自由基阳离子，其中电荷和奇电子在所有四个硫族元素原子上相等地离域。光谱学方法，特别是EPR光谱，提出了确定这些材料的结构。杂原子星甾烷的双电子氧化将被研究，以评估α-芳香性理论。如果它们是a-离域的，则它们可能显示出不寻常的性质。这种可能性将通过光谱方法，特别是NMR光谱进行评估。这项拟议的合作工作将Potapov教授小组在合成杂原子化学方面的研究优势与Glass教授小组在结构和氧化还原化学方面的研究优势结合在一起，这是一个互惠互利的项目，可以扩展我们对影响电子转移的多中心键合和结构因素的理解。在国际科学与工程办公室的有机和高分子化学计划和中欧和东欧计划将支持理查德教授的研究和国际合作。亚利桑那大学的玻璃。

Professor Glass will lead a collaborative project involving the research groups of Professor Potapov (Irkutsk, Russia) and Professor Glass (Tucson, AZ, USA) on the synthesis and redox chemistry of tetrachalcogentetraasteranes (sulfur, selenium and tellurium) is proposed. The synthesis of these "star-shaped" molecules is based on the photodimerization of 1,4-dichalcogenins. The oxidation of these materials will be studied using the electrochemical technique of cyclic voltammetry and chemical oxidants. One-electron oxidation of these compounds may provide stable radical cations with novel structures in which the charge and the odd electron are delocalized equally over all four chalcogen atoms. Spectroscopic methods, especially EPR spectroscopy, are proposed for determining the structures of these materials. Two-electron oxidation of the heteroatom asteranes will be investigated to evaluate the theory of a-aromaticity. The dications may show unusual properties if they are a-delocalized. This possibility will be evaluated by spectroscopic methods, especially NMR spectroscopy. This proposed collaborative work combines the research strengths of Professor Potapov's group in synthetic heteroatom chemistry with that of Professor Glass' group in structural and redox chemistry in a mutually beneficial project which may extend our understanding of multicenter bonding and structural factors that affect electron-transfer.With this Award, The Organic and Macromolecular Chemistry Program and the Central and Eastern Europe Program in the Office of International Science and Engineering will support the research and international collaboration of Professor Richard S. Glass of the University of Arizona.