title: Dimeric supramolecular motifs of two carboxylate-guanidinium compounds.
abstract: The structures of N-benzyl-N'-{6-[(4-carboxylatobenzyl)aminocarbonyl]-2-pyridylmethyl}guanidinium, C(23)H(23)N(5)O(3), (I), and N-[2-(benzylaminocarbonyl)ethyl]-N'-{6-[(4-carboxylatobenzyl)aminocarbonyl]-2-pyridylmethyl}guanidinium monohydrate, C(26)H(28)N(6)O(4).H(2)O, (II), both form three-dimensional supramolecular hydrogen-bonded networks based on a dimeric primary synthon involving carboxylate-guanidinium linkages. The differences in the geometries and hydrogen-bonding connectivities are driven by the additional methylpropionamide group and water of crystallization of (II).
authors.affiliation: Institute of Chemistry, University of the Punjab, Lahore 54590, Pakistan.
authors.forename: Muhammad Irfan
authors.initials: MI
authors.lastname: Ashiq
authors.forename: Ishtiaq
authors.initials: I
authors.lastname: Hussain
authors.forename: Sally
authors.initials: S
authors.lastname: Dixon
authors.forename: Mark E
authors.initials: ME
authors.lastname: Light
authors.forename: Jeremy D
authors.initials: JD
authors.lastname: Kilburn