Titre : Adventures in Organo-Oligogermane Chemistry.
La conférence sera prononcée par le professeur Charles Scott Weinert du département de chimie de l'Oklahoma State University. Elle sera donnée en anglais.
Résumé : Methods for the synthesis of discrete oligogermanes having germanium – germanium single bonds has, until recently, been complicated by the formation of complex mixtures of products and/or low yields, and this has precluded a detailed survey of the structure/property relationships in these systems. We have developed a method for the rational synthesis of these compounds that employs the hydrogermolysis reaction between a germanium amide and a germanium hydride, either alone or in conjunction with a hydride protection/deprotection strategy. Using this method, we have obtained a library of oligogermanium compounds having a variety of chain lengths and substituent patterns, and both linear and branched systems have been prepared. We wish to report our recent findings in this area, and will discuss the preparation of a series of para-tolyl substituted linear systems as well as several new rare branched compounds having hydride or halide substituents. Both types of oligogermanes have been characterized by UV/visible spectroscopy and cyclic voltammetry, and we have correlated their spectral and electrochemical data with their structures.
