Synthesis and structure of a binuclear calcium nitrate coordination complex with bridging zwitterionic nicotinic acid
The title coordination complex, bis-(μ-pyridin-1-ium-3-carboxyl-ato-κ<sup>2</sup> <i>O</i>:<i>O</i>')bis-[di-aqua-bis-(nitrato-κ<sup>2</sup> <i>O</i>,<i>O</i>')calcium(II)], [Ca<sub>2</sub>(C<sub>6</sub>H<sub>5</sub>NO<sub>2</sub>)<sub>2</sub>(NO<sub>3</sub>)<sub>4</sub>(H<sub>2</sub>O)<sub>4</sub>], was prepared from calcium nitrate and nicotinic acid in a water-ethanol solvent mixture. The asymmetric unit contains a half mol-ecule of the complex, with the calcium atom exhibiting a coordination number of eight, forming a distorted dodeca-hedral geometry with a mixed-ligand environment. The μ<sub>2</sub>-O,<i>O</i>' bridging zwitterionic nicotinic acid mol-ecules generate a centrosymmetric dinuclear complex. The extended structure features N-H⋯O, O-H⋯O and C-H⋯O hydrogen bonds, which generate a three-dimensional network. Hirshfeld surface and two-dimensional fingerprint plot analyses were performed to qu-antify and visualize the inter-molecular inter-actions contributing to the overall cohesion of the structure.
Authors
- Odil Choriev
- Bаtirbаy Tоrаmbеtоv (ORCID: https://orcid.org/0000-0002-9218-5596)
- Shakhnoza Kadirova (ORCID: https://orcid.org/0000-0002-0084-7653)
- Aysanem Bektursinova
- Zulfiya Djumanazarova
- Saule Meldebekova (ORCID: https://orcid.org/0009-0002-3487-2467)
- Jamshid Ashurov
- Gulmira Burkitbaeva
Institutions
- Academy of Sciences Republic of Uzbekistan (UZ)
- Karakalpak State University (UZ)
- National University of Uzbekistan (UZ)
Publication Details
- Journal
- Acta Crystallographica Section E Crystallographic Communications
- Published
- 2026-02-09
- DOI
- https://doi.org/10.1107/s2056989026001271
- Primary Topic
- Metal-Organic Frameworks: Synthesis and Applications
- Type
- article
- Field-Weighted Citation Impact
- 0.00