title: A generalized model for the molecular arrangement in the columnar mesophases of polycatenar mesogens. Crystal and molecular structure of two hexacatenar mesogens.
abstract: The columnar mesophases of two series of hexacatenar palladium(II) mesogens have been studied in detail by a combination of X-ray diffraction on aligned and unaligned samples and dilatometry. The results of these studies, combined with the results of two single crystal structure determinations, have allowed a model of the molecular arrangement in the columnar phases to be proposed. This model differs in detail from that generally accepted for the arrangement of polycatenar mesogens in columnar phases, and a new model is proposed which accounts for both new and existing data.
authors.affiliation: Department of Chemistry, University of Exeter, Stocker Road, EXETER EX4 4QD, UK. bdonnio@ipscms.u-strasbg.fr
authors.forename: Bertrand
authors.initials: B
authors.lastname: Donnio
authors.forename: Benoît
authors.initials: B
authors.lastname: Heinrich
authors.forename: Hassan
authors.initials: H
authors.lastname: Allouchi
authors.forename: Jens
authors.initials: J
authors.lastname: Kain
authors.forename: Siegmar
authors.initials: S
authors.lastname: Diele
authors.forename: Daniel
authors.initials: D
authors.lastname: Guillon
authors.forename: Duncan W
authors.initials: DW
authors.lastname: Bruce