title: Bis(carboxy-meth-yl)ammonium 4-toluene-sulfonate.
abstract: The imino-diacetic acid component of the title salt, C(4)H(8)NO(4) (+)·C(7)H(7)SO(3) (-), is protonated at the N atom. The cation uses the ammonium group to form hydrogen bonds to the O atoms of two adjacent sulfonate groups. In addition, the carboxylic acid portions of the cation form hydrogen bonds to the sulfonate groups. The hydrogen-bonding inter-actions give rise to a layer structure.
authors.affiliation: Department of Chemistry, University of Malaya, 50603 Kuala Lumpur, Malaysia.
authors.forename: Kong Mun
authors.initials: KM
authors.lastname: Lo
authors.forename: Seik Weng
authors.initials: SW
authors.lastname: Ng