title: Synthesis of 2-pyridone-fused 2,2'-bipyridine derivatives. An unexpectedly complex solid state structure of 3,6-dimethyl-9H-4,5,9-triazaphenanthren-10-one.
abstract: 2-Pyridone-fused 2,2'-bipyridine derivatives and were synthesised. X-Ray diffraction analysis of revealed a highly complex solid state structure with a disordered molecule imbedded in a channel structure formed by a centrosymmetric lattice of hexagonally packed, hydrogen bonded columns. The columns are assembled from three symmetry independent molecules. Dimerisation of the self-complementary cis-amide hydrogen bond motif is overridden by the fulfilment of the proton coordination ability of the phenanthroline nitrogens in accordance with Etter's rules of hydrogen bond priorities.
authors.affiliation: Organic Chemistry 1, Dept. of Chemistry, Lund University, P.O. Box 124, SE-22100 Lund, Sweden.
authors.forename: Stefán
authors.initials: S
authors.lastname: Jónsson
authors.forename: Carlos Solano
authors.initials: CS
authors.lastname: Arribas
authors.forename: Ola F
authors.initials: OF
authors.lastname: Wendt
authors.forename: Jay S
authors.initials: JS
authors.lastname: Siegel
authors.forename: Kenneth
authors.initials: K
authors.lastname: Wärnmark