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. 2022 Mar 8;78(4):231–239. doi: 10.1107/S205322962200239X

Synthesis, structural analysis, and docking studies with SARS‐CoV‐2 of a trinuclear zinc complex with N‐phenylanthranilic acid ligands

Armel L Mbani O 1, Evan F Bonnand 2, Awawou G Paboudam 1, Jacob P Brannon 2, Kevyn D Gardner-Ricossa 2, S Chantal E Stieber 2,, Moise O Agwara 1
PMCID: PMC9111127  PMID: 35380126

Abstract

The structure of a trinuclear zinc complex, hexakis(μ2‐2‐anilinobenzoato)diaquatrizinc(II), [Zn2(C13H10NO2)6(H2O)2] or (NPA)6Zn3(H2O)2 (NPA is 2‐anilinobenzoate or N‐phenylanthranilate), is reported. The complex crystallizes in the triclinic space group P Inline graphic and the central ZnII atom is located on an inversion center. The NPA ligand is found to coordinate via the carboxylate O atoms with unique C—O bond lengths that support an unequal distribution of resonance over the carboxylate fragment. The axial H2O ligands form hydrogen bonds with neighboring molecules that stabilize the supramolecular system in rigid straight chains, with an angle of 180° along the c axis. π stacking is the primary stabilization along the a and b axes, resulting in a highly ordered supramolecular structure. Docking studies show that this unique supramolecular structure of a trinuclear zinc complex has potential for binding to the main protease (Mpro) in SARS‐CoV‐2 in a different location from Remdesivir, but with a similar binding strength.

Keywords: trinuclear, phenylanthranilic acid, NPA, zinc, inorganic chemistry, organometallic, SARS‐CoV‐2, molecular docking, crystal structure


A trinuclear zinc complex with six N‐phenylanthranilic acid ligands is structurally characterized and docking with SARS‐CoV‐2 is reported.

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Articles from Acta Crystallographica. Section C, Structural Chemistry are provided here courtesy of Wiley

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