Poly[[[diaquabis(pyridine-4-carboxamide-kappa N-1)cobalt(II)]-mu(2)-squarato-kappa O : O '] dihydrate]
ACTA CRYSTALLOGRAPHICA SECTION E-CRYSTALLOGRAPHIC COMMUNICATIONS, vol.61, 2005 (SCI-Expanded)
- Publication Type: Article / Article
- Volume: 61
- Publication Date: 2005
- Doi Number: 10.1107/s1600536805018295
- Journal Name: ACTA CRYSTALLOGRAPHICA SECTION E-CRYSTALLOGRAPHIC COMMUNICATIONS
- Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED)
- Ondokuz Mayıs University Affiliated: No
Abstract
The title polymeric compound, {[Co(C4O4)(C6H6N2O)(2)-(H2O)(2)].2H(2)O}(n), has two crystallographically independent half-molecules in the asymmetric unit, each Co atom residing on a center of symmetry. The two polymeric chains exhibit similar coordination geometry but display differences with regard to other structural features. Each Co-II center is octahedrally coordinated by two mutually trans pyridine-4-carboxamide ( or isonicotinamide) ligands, two mutually trans squarate ligands and two trans aqua ligands. The crystal structure contains chains of squarate-1,3-bridged Co-II ions. These chains are held together by N - H........O and O - H........O intermolecular hydrogen-bond interactions, forming an extensive three-dimensional network.