title: (3-{[N-(5-Chloro-2-hy-droxy-phen-yl)oxamo-yl]amino}-prop-yl)dimethyl-aza-nium perchlorate.
abstract: In the title compound, C(13)H(19)ClN(3)O(3) (+)·ClO(4) (-), the 3-(di-meth-yl-ammonio)-propyl group of the cation is disordered over two sets of sites with occupancies 0.772 (6) and 0.228 (6). The cations are joined by pairs of N-H⋯O hydrogen bonds into centrosymmetric dimers and these dimers are assembled into chains along the a-axis direction, also through N-H⋯O hydrogen bonds. The perchlorate anions are linked to the hy-droxy groups of the cations by O-H⋯O hydrogen bonds. The positively charged ammonium groups and the anions give rise to folded layers parallel to the ab plane.
authors.forename: Xi-Teng
authors.initials: XT
authors.lastname: Yue
authors.forename: Xiao-Wen
authors.initials: XW
authors.lastname: Li
authors.forename: Zhi-Yong
authors.initials: ZY
authors.lastname: Wu