Synthesis and crystal structure of trans-[Ni(pyzdcH)M2(H2O) 2] based on pyrazine-2,3-dicarboxylic acid
The determined structure of the title compound C24H20Ni2N8O20 consists of the mononuclear trans-[Ni(pyzdc)2(H2O)2], (pyzdc = pyrazine-2,3- dicarboxylate). The Ni(II) atom is hexa-coordinated by two (pyzdcH)- groups and two water molecules. The coordinated water molecules are in trans-diaxial positions and the (pyzdcH)- anion acts as a bidentate ligand through an O atom of the carboxylate group and the N atom of the pyrazine ring. There are diverse hydrogen bonding interactions such as O—H···N and O—H···O contacts, which lead to the formation of a three-dimensional supramolecular architecture.
KEY WORDS: Ni(II), Pyrazine-2,3-dicarboxylic acid, Coordination chemistry, Supramolecular chemistry, Hydrogen bond, Proton transfer