Chromatography of organometallic and organometalloidal derivatives of amino alcohols : II. Gas Chromatographic evidence for transannular bonds in solutes

Abstract

The applicability of gas chromatography to the resolution of boratranes and germatranes on polar and non-polar stationary phases at 200-250°C has been demonstrated. A remarkably high retention reported earlier for silatranes is also exhibited by boratranes, germatranes and stannatranes. The effects modification of the attrane framework and of introduction of substituents on retention parameters indicate the association of atrane molecules with the stationary phase molecules is essentially controlled by the oxygen atoms of the atranes. The difference between experimental and theoretical values of retention indices has been correlated with some physical and chemical properties of transannular bonds, and can be used as a criterion of the presence of such a bond in solute molecules under gas-liquid chromatographic conditions.