A new coordination mode of 6-methylnicotinic acid in trans-tetraaquabis(6-methylpyridine-3-carboxylato-kappaO)cobalt(II) tetrahydrate.
The title compound, [Co(C7H6NO2)2(H2O)4] x 4 H2O, contains a Co(II) ion lying on a crystallographic inversion centre. The Co(II) ion is octahedrally coordinated by two 6-methylpyridine-3-carboxylate ligands in axial positions [Co-O = 2.0621 (9) A] and by four water molecules in the equatorial plane [Co-O = 2.1169 (9) and 2.1223 (11) A]. There are also four uncoordinated water molecules. The 6-methylpyridine-3-carboxylate ligands are bound to the Co(II) ion in a monodentate manner through a carboxylate O atom. There is one strong intramolecular O-H...O hydrogen bond, and six strong intermolecular hydrogen bonds of type O-H...O and one of type O-H...N in the packing, resulting in a complex three-dimensional supramolecular structure.
Laboratory of General and Inorganic Chemistry, Department of Chemistry, Faculty of Science, University of Zagreb, Horvatovac 102 a, HR-10000 Zagreb, Croatia.
Boris-Marko
BM
Kukovec
Zora
Z
Popović
Gordana
G
Pavlović
D003035:Cobalt / Q000737:chemistry*; D018360:Crystallography, X-Ray; D008024:Ligands; D015394:Molecular Structure; D009539:Nicotinic Acids / Q000737:chemistry*; D009942:Organometallic Compounds / Q000138:chemical synthesis / Q000737:chemistry*; D011725:Pyridines / Q000737:chemistry*
D008024:Ligands; D009539:Nicotinic Acids; D009942:Organometallic Compounds; D011725:Pyridines; C525575:tetraaquabis(6-methylpyridine-3-carboxylato-kappaO)cobalt(II); D003035:Cobalt; C008473:methyl nicotinate