Abstract: The reaction of 2,2′-bipyridine-5,5′-dicarboxylic acid (HO2CC12H6N2CO2H, H2bpydicarb) with the appropriate metal salt in water provided the mononuclear complexes [M(II)(bpydicarb)(H2O)4]·2H2O where M(II) = Co and Ni. The isomorphous materials exhibit neutral six-coordinate metal–ligand complexes with MN2O4 geometry. Charge balance is achieved through deprotonation of the carboxylate groups. The Co compound crystallizes in the monoclinic space group C2/c with a = 12.696(4) Å, b = 9.195(4) Å, c = 13.207(5) Å, β = 93.78(1)°; the isomorphous Ni compound exhibits cell parameters a = 12.477(4) Å, b = 9.818(3) Å, c = 12.658(4) Å, β = 92.099(6)°. Graphic Abstract: The six coordinate structure of [Co(II)(bpydicarb)(H2O)4] achieves charge balance through deprotonation of the carboxylate residues of the bipyridine-based ligand.[Figure not available: see fulltext.].
- 2,2′-bipyridine-5,5′-dicarboxylate complexes
- Aqua complexes
- X-ray diffraction
ASJC Scopus subject areas
- Condensed Matter Physics