title: 1,4,5,8-naphthalenetetracarboxylic acid cyclic 1,8-anhydride bis(dimethyl sulfoxide) solvate and 1,4,5,8-naphthalenetetracarboxylic 1,8:4,5-dianhydride.
abstract: 1,4,5,8-Naphthalenetetracarboxylic acid cyclic 1,8-anhydride crystallized from dimethyl sulfoxide (DMSO) as the solvate, C14H6O7.2C2H6OS, in the centrosymmetric space group P1. Two O-H...O hydrogen bonds with O...O distances of 2.592 (3) and 2.598 (3) A are formed, with the two carboxylic acid OH groups as donors and the O atoms of the two inequivalent DMSO molecules as acceptors. The carboxylic H atoms are ordered, as are the carboxylic O atoms. In addition to the conventional hydrogen bonds, there are numerous C-H...O interactions consistent with the large number of potential CH donors and O-atom acceptors. 1,4,5,8-Naphthalenetetracarboxylic 1,8:4,5-dianhydride, C14H4O6, crystallized in the centrosymmetric space group P2(1)/c with half the molecule as the asymmetric unit. Each molecule is involved in four significant C-H...O interactions as a donor and in an additional four as an acceptor. These eight interactions link each molecule to six neighboring molecules, forming a three-dimensional network. Geometric parameters of both substances are in general agreement with analogous parameters for naphthalic anhydride, monosodium 1,4,5,8-naphthalenetetracarboxylic acid cyclic 1,8-anhydride monohydrate and 1,4,5,8-naphthalenetetracarboxylic 1,8:4,5-dianhydride, as reported previously.
authors.affiliation: Department of Chemistry, Ohio State University, Columbus 43210, USA. gerkin@chemistry.ohio-state.edu
authors.forename: A C
authors.initials: AC
authors.lastname: Blackburn
authors.forename: L J
authors.initials: LJ
authors.lastname: Fitzgerald
authors.forename: R E
authors.initials: RE
authors.lastname: Gerkin
mesh_terms: D000812:Anhydrides / Q000737:chemistry*; D055598:Chemical Phenomena; D002627:Chemistry, Physical; D003460:Crystallization; D018360:Crystallography, X-Ray; D004121:Dimethyl Sulfoxide; D006860:Hydrogen Bonding; D008958:Models, Molecular; D015394:Molecular Structure; D009281:Naphthalenes / Q000737:chemistry*
chemical_list: D000812:Anhydrides; D009281:Naphthalenes; C110450:naphthalenetetracarboxylic acid anhydride solvate; C110449:naphthalenetetracarboxylic dianhydride; D004121:Dimethyl Sulfoxide