title: Dimethyl-ammonium bis-(3-oxidonaphthalene-2-carboxyl-ato)borate hemihydrate.
abstract: The title compound, C(2)H(8)N(+)·C(22)H(12)BO(6) (-)·0.5H(2)O, was synthesized under atmospheric conditions in the presence of dimethyl-formamide acting as a template. The structure is composed of [NH(2)(CH(3))(2)](+) cations, bis-(3-oxidonaphthalene-2-carboxyl-ato)borate anions and water mol-ecules. The water molecule lies on a twofold rotation axis. The stabilization of the crystal structure comes from electrostatic inter-actions and is assisted by inter-molecular O-H⋯O and N-H⋯O hydrogen bonds between the layers.
authors.forename: Mustafa
authors.initials: M
authors.lastname: Tombul
authors.forename: Kutalmış
authors.initials: K
authors.lastname: Güven
authors.forename: Ingrid
authors.initials: I
authors.lastname: Svoboda