Translational isomerism and dynamics in multi-hydroquinone derived porphyrin [2]- and [3]-catenanes
作者:Maxwell J. Gunter、Sandra M. Farquhar、Tyrone P. Jeynes
DOI:10.1039/b308157e
日期:——
isolated as mixtures of atropisomers, where the linking strap spans across the face of the porphyrin (alpha,alpha-isomer), or 'twisted' around its side (alpha,beta-isomer). Their structures were determined by detailed 1H NMR spectroscopy. The bis-1,4-dioxybenzene-strapped derivatives were shown to undergo atropisomerisation on heating, to produce an equilibrium mixture. Catenation under high pressure conditions