title: A one-dimensional copper(II) phenyl-ene-diphospho-nate: catena-poly[[(1,10-phenanthroline-κN,N')copper(II)]-μ(3)-[m-phenyl-enediphospho-nato-κO:O':O'']].
abstract: The title compound, [Cu(1,3-HO(3)PC(6)H(4)PO(3)H)(C(12)H(8)N(2))](n), is a coordination polymer of the metal-diphospho-nate family. The chain structure is constructed from '4+1' square-py-rami-dally coordinated copper(II) atoms bonded to chelating phenanthroline (phen) ligands and linked through 1,3-phenyldihydrogendiphospho-nate ligands. The basal plane of the Cu(II) site is defined by the phen nitro-gen donors and phospho-nate oxygen atoms from two diphospho-nate ligands, while the apical position is occupied by an oxygen donor from a third diphospho-nate ligand. The chains propagate along the a-axis direction. Inversion-related phen groups engage in π-π stacking with a mean distance of 3.376 (2) Å between the ring planes. O-H⋯O hydrogen-bonding inter-actions between the protonated {P-OH} groups of one chain and the {P=O} groups of adjacent chains stabilize the crystal packing.
authors.affiliation: Department of Chemistry, Syracuse University, Syracuse, New York 13244, USA.
authors.forename: Paul
authors.initials: P
authors.lastname: Deburgomaster
authors.forename: Jon
authors.initials: J
authors.lastname: Zubieta