title: [4'-(4-Amino-phen-yl)-2,2':6',2''-terpyridine]-chloridopalladium(II) chloride.
abstract: The Pd(II) atom in the complex cation of the title compound, [PdCl(C(21)H(16)N(4))]Cl, is coordinated by three N atoms derived from the terpyridine ligand and a chloride ion, which define a distorted PdClN(3) square-planar coordination geometry. In the crystal, the presence of N-H⋯Cl hydrogen bonds involving the amino H atom and chloride anions link two cations and two anions into a four-ion aggregate via centrosymmetric eight-membered [⋯H-N-H⋯Cl](2) synthons. Layers of cations are inter-spersed with the chloride anions with stabilization provided by C-H⋯Cl inter-actions involving both Cl atoms, as well as π-π inter-actions [the closest inter-action of 3.489 (6) Å occurs between a chelate ring and a pyridyl residue].
authors.forename: John C
authors.initials: JC
authors.lastname: Thomas
authors.forename: Edward R T
authors.initials: ER
authors.lastname: Tiekink
authors.forename: Judith A
authors.initials: JA
authors.lastname: Walmsley