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

Tiffany J. Greenfield, Jon Zubieta, Robert P. Doyle

Research output: Contribution to journalArticle

Abstract

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.].

Original languageEnglish (US)
JournalJournal of Chemical Crystallography
DOIs
StateAccepted/In press - 2020

Keywords

  • 2,2′-bipyridine-5,5′-dicarboxylate complexes
  • Aqua complexes
  • Cobalt
  • Nickel
  • X-ray diffraction

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics

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