Conformations of calix[4]arenes - an investigation based on CSD data. Part II. Partial cone, 1,2-alternate and 1,3-alternate conformers of methyleneand heteroatom-bridged calix[4]arenes
2017
Abstract
In the first part of this investigation (Part I), cone conformers of calix[4]arenes with methylene and heteroatom bridges from the Cambridge Structural Database (CSD) were investigated. Previously introduced parameters alfa, beta and gama were utilized in describing the conformations of the hydrocarbon base frame of the above mentined compounds.
In this part of the investigation, partial cone, 1,2- and 1,3-alternate conformers of methylene- and heteroatom-bridged calix[4]arenes are studied and the influence of inter- and intramolecular interactions on the conformations of these compounds is evaluated.