title: 1-[4-(Diamino-methyl-eneamino-sulfon-yl)phenyl-iminiometh-yl]-2-naphtholate N,N-dimethyl-formamide disolvate.
abstract: The asymmetric unit the title compound, C(18)H(16)N(4)O(3)S·2C(3)H(7)NO, contains a mol-ecule in a zwitterionic form with a deprotonated hydroxyl group and an iminium group, and two dimethyl-formamide solvent mol-ecules. The dihedral angles of the guanidine group and the naphthyl ring system with respect to the central benzene ring are 76.04 (7) and 3.45 (9)°, respectively. The conformation of the mol-ecule may be influenced, in part, by two intra-molecular hydrogen bonds, while in the crystal structure, inter-molecular hydrogen bonds form one-dimensional chains along [010].
authors.forename: Hoda
authors.initials: H
authors.lastname: El-Ghamry
authors.forename: Raafat
authors.initials: R
authors.lastname: Issa
authors.forename: Kamal
authors.initials: K
authors.lastname: El-Baradie
authors.forename: Keiko
authors.initials: K
authors.lastname: Isagai
authors.forename: Shigeyuki
authors.initials: S
authors.lastname: Masaoka
authors.forename: Ken
authors.initials: K
authors.lastname: Sakai