Triarylmethanols with Bulky Aryl Groups and the NOESY/EXSY Experimental Observation of a Two-Ring-Flip Mechanism for the Helicity Reversal of Molecular Propellers
作者:Victor M. Tormyshev、Alexander M. Genaev、Georgy E. Sal'nikov、Olga Yu. Rogozhnikova、Tatiana I. Troitskaya、Dmitry V. Trukhin、Victor I. Mamatyuk、Dmitry S. Fadeev、Howard J. Halpern
DOI:10.1002/ejoc.201101243
日期:2012.1
Triarylmethanols - the direct precursors of persistent trityl radicals - are racemic mixtures of chiral three-bladed molecularpropellers. Depending on bulkiness of arylgroups they exhibit various liabilities to interconversion, the half- life time of room temperature racemization varying in a range between 8.4 hours and 1.32 years. NOESY/EXSY experiment performed on two representative models strongly