title: Crystal structure of 4-sulfamoylanilinium di-hydrogen phosphate.
abstract: In the crystal structure of the title mol-ecular salt, C6H9N2O2S(+)·H2PO4 (-), the sulfomylalinium cations and the di-hydrogen phosphate anions form independent [100] chains through Ns-H⋯O (s = sulfamo-yl) and O-H⋯O hydrogen bonds, respectively. The chains are cross-linked by Na-H⋯O (a = amine) hydrogen bonds, generating (010) sheets. Two C-H⋯O hydrogen bonds involving diametrically opposite C atoms in the benzene ring of the cation as donors form chains parallel to [202] in which P=O and P-OH groups are acceptors. Together, these inter-actions lead to a three-dimensional network.
authors.affiliation: Department of Physics, Devangar Arts College, Aruppukottai 626 101, Tamil Nadu, India.
authors.forename: C
authors.initials: C
authors.lastname: Muthuselvi
authors.affiliation: Department of Physics, Devangar Arts College, Aruppukottai 626 101, Tamil Nadu, India.
authors.forename: N
authors.initials: N
authors.lastname: Mala
authors.affiliation: Department of Physics, Thiagarajar College, Madurai 625 009, Tamil Nadu, India.
authors.forename: N
authors.initials: N
authors.lastname: Srinivasan
authors.affiliation: Department of Physics, Devangar Arts College, Aruppukottai 626 101, Tamil Nadu, India.
authors.forename: S
authors.initials: S
authors.lastname: Pandiarajan
authors.affiliation: Department of Physics, Thiagarajar College, Madurai 625 009, Tamil Nadu, India.
authors.forename: R V
authors.initials: RV
authors.lastname: Krishnakumar
keywords: 4-sulfamoylanilinium; crystal structure; di­hydrogen phosphate; hydrogen bonding; sulfa drugs; sulfanilamide derivatives