Diaquabis(pyridine-2-carboxamide-kappa N-2(1),O-2)nickel(II) disaccharinate tetrahydrate

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Pasaoglu H., Tezcan F., YEŞİLEL O. Z., Olmez H., Icbudak H., Buyukgungor O.

ACTA CRYSTALLOGRAPHICA SECTION C-STRUCTURAL CHEMISTRY, vol.60, 2004 (SCI-Expanded)

• Publication Type: Article / Article
• Volume: 60
• Publication Date: 2004
• Doi Number: 10.1107/s0108270104012648
• Journal Name: ACTA CRYSTALLOGRAPHICA SECTION C-STRUCTURAL CHEMISTRY
• Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED)
• Ondokuz Mayıs University Affiliated: No

Abstract

In the crystal structure of the title compound, [Ni(C6H6N2O)(2)-(H2O)(2)](C7H4NO3S)(2).4H(2)O or [Ni(pia)(2)(H2O)(2)](sac)(2).4H(2)O ( pia is picolinamide or pyridine-2-carboxamide, and sac is the saccharinate anion), the Ni2+ cation, located on a centre of symmetry, is coordinated by two symmetry-related aqua ligands together with a pair of symmetry-related bidentate pia molecules and exhibits a distorted octahedral environment. The unique unligated sac anion in the asymmetric unit resides on a general position and has a single negative charge. The coordinated water molecules link the sac ions to the metal complex via O-H...O hydrogen bonds. In addition, the sac ions are linked to the metal complex via intermolecular pi-pi interactions between the benzene ring of the sac ion and the pyridine ring of a pia ligand. Each uncoordinated water molecule is hydrogen bonded to sac moieties through O-H...O and O-H...N hydrogen bonds.