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Article
Structure of 2,9-dimethyl-1,10-phenanthroline hemihydrate
Acta Crystallographica. Section C: Crystal Structure Communications
  • Doyle Britton, University of Minnesota - Twin Cities
  • Larry C. Thompson, University of Minnesota - Duluth
  • Richard C. Holz, Marquette University
Document Type
Article
Publication Date
5-1-1991
Disciplines
Abstract
C14H12N2•½H2O, Mr = 217•27, tetragonal I41/a, a = 14•258 (3), c = 22•286 (4) Å, V = 4531 (3) Å3, Z = 16, Dx = 1•274 (1) g cm-3, Mo Kα radiation λ = 0•71073 Å, µ = 0•74 cm-1, F(000) = 1840, T = 297 K, R = 0•041 for 1196 unique observed reflections with I > 2σ(I). Pairs of dimethylphenanthroline molecules related by a twofold axis are bridged by water molecules lying on the twofold axis and H bonded to one of the N atoms in each molecule. The H bonds are long and far from linear: O—H 1•06 (4), H•••N 154 (3)°. This is presumably a consequence of the approximately parallel arrangement of the two phenanthroline molecules in the (phen)2.H2O complex, which are tilted 4•7 (1)° with respect to each other; the atoms in one molecule are 3•50 to 3•81 Å from the plane of the other molecule. On the other side of the phenanthroline is another phenanthroline related by a center of symmetry with the atoms of one molecule 3•41 to 3•45 Å from the plane of the other molecule. The phenanthroline molecule has close to 2mm symmetry, but the individual C6 rings are tilted about 1° with respect to each other.
Comments

Published version. Acta Crystallographica. Section C: Crystal Structure Communications, Vol. 47, No. 5 (May 1991): 1101-1103. DOI.© International Union of Crystallography 1991. Used with permission.

Richard Holz was affiliated with the University of Minnesota - Duluth at the time of publication.

Citation Information
Doyle Britton, Larry C. Thompson and Richard C. Holz. "Structure of 2,9-dimethyl-1,10-phenanthroline hemihydrate" Acta Crystallographica. Section C: Crystal Structure Communications (1991) ISSN: 0108-2701
Available at: http://works.bepress.com/richard_holz/51/