Crystal and Molecular Structures of 2,2′-bipyridine-5,5′-dicarboxylate Complexes: [M(II)(O2CC10H6N2CO2)(H2O)4] (M = Co, Ni)

The reaction of 2,2′-bipyridine-5,5′-dicarboxylic acid (HO 2 CC 12 H 6 N 2 CO 2 H, H 2 bpydicarb) with the appropriate metal salt in water provided the mononuclear complexes [M(II)(bpydicarb)(H 2 O) 4 ]·2H 2 O where M(II) = Co and Ni. The isomorphous materials exhibit neutral six-coordinate metal–li...

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Bibliographic Details
Published in:Journal of chemical crystallography 2021-06, Vol.51 (2), p.191-195
Main Authors: Greenfield, Tiffany J., Zubieta, Jon, Doyle, Robert P.
Format: Article
Language:English
Subjects:
Chemistry
Chemistry and Materials Science
Coordination compounds
Crystal structure
Crystallography and Scattering Methods
Dicarboxylic acids
Inorganic Chemistry
Ligands
Molecular structure
Nickel compounds
Organometallic Chemistry
Original Paper
Physical Chemistry
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Summary:The reaction of 2,2′-bipyridine-5,5′-dicarboxylic acid (HO 2 CC 12 H 6 N 2 CO 2 H, H 2 bpydicarb) with the appropriate metal salt in water provided the mononuclear complexes [M(II)(bpydicarb)(H 2 O) 4 ]·2H 2 O where M(II) = Co and Ni. The isomorphous materials exhibit neutral six-coordinate metal–ligand complexes with MN 2 O 4 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)(H 2 O) 4 ] achieves charge balance through deprotonation of the carboxylate residues of the bipyridine-based ligand.
ISSN:1074-1542
1572-8854
DOI:10.1007/s10870-020-00839-0