title: Diaquabis(4,4'-bipyridine-N)bis(dihydrogenphosphato-O)copper(II): blocking of extended metal-ligand coordination by hydrogen bonding.
abstract: The title compound, [Cu(H(2)PO(4))(2)(C(10)H(8)N(2))(2)(H(2)O)(2)], is a mononuclear complex in which the Cu atom is square-planar coordinated by two dihydrogenphosphate anions and two monodentate 4,4'-bipyridine (4,4'-bipy) groups, and by two more distant aqua ligands to complete a distorted octahedral coordination. Metal-metal bridging by 4,4'-bipy is blocked by intermolecular hydrogen bonding from the dihydrogenphosphate to the second N atom of 4,4'-bipy. The crystal packing is controlled both by additional hydrogen bonding between the aqua and phosphate ligands and by pi-stacking. These hydrogen-bonding interactions create two-dimensional networks which are connected by the bipyridine ligands.
authors.affiliation: Institut für Anorganische und Analytische Chemie, Universität Freiburg, Albertstrasse 21, D-79104 Freiburg, Germany.
authors.forename: K
authors.initials: K
authors.lastname: Abu-Shandi
authors.forename: C
authors.initials: C
authors.lastname: Janiak
authors.forename: B
authors.initials: B
authors.lastname: Kersting