The one-dimensional coordination polymer poly[tetrakis[(4-chlorophenyl)methanaminium] [cadmate-μ-cyclohexaphosphorato]]

Abstract

Cyclo­hexa­phospho­ric acid (P6O18H6) reacts with cadmium carbonate and 4-chloro­benzyl­amine (CBA) to give the mononuclear title complex, (C7H9ClN)4[Cd(P6O18)]n, in which the CdII atom, lying on an inversion centre, has an octa­hedral coordination built of six O atoms of two centrosymmetric P6O18 rings. Each P6O18 ligand acts as a bridge, linking two CdII atoms and forming an anionic coordination polymer [Cd(P6O18)4−]n extending along [010]. Adjacent polymeric chains are connected through N—H⋯O and C—H⋯O hydrogen bonds, generating a three-dimensional supra­molecular network.

Dilithium disodium nickel(II) cyclohexaphosphate dodecahydrate, Li2Na2NiP6O18·12H2O

“…The smallest distance between two octahedral centers is 9.069 Å. The cyclic anion (P 6 O 18 ) 6has a chair conformation with geometrical characteristics that show no significant difference deviation from those observed in other cyclohexaphosphates having the same internal symmetry -1 (Abid et al 2011,Amri et al2009Marouani et al2010). In addition to its interactions with the metallic cations, the phosphoric anion establish with the water molecules an important hydrogen-bonding scheme.…”

“…For the crystal chemistry of cyclic phosphates, see: Averbuch-Pouchot & Durif (1996). For related structures containing cyclohexaphosphate rings, see: Abid et al (2011); Amri et al (2009); Marouani et al (2010). For hydrogen bonding, see: Blessing (1986).…”