Related Experiment Video
Updated: May 7, 2026

Thermochemical Studies of Ni(II) and Zn(II) Ternary Complexes Using Ion Mobility-Mass Spectrometry
Published on: June 8, 2022
Preparation and Characterization of a New Example of a Double Salt of Nickel(II) Complexes
Abstract:
A new double salt of nickel(II) complexes, formulated as, [Ni(bipy)(H2O)4][Ni(H2O)6][Ni(pydc)2]2 • 6H2O, (1), (pydc = pyridine-2,6-dicarboxylate anion, bipy = 2,2'-bipyridine) has been hydrothermally synthesized. Complex was characterized by FT-IR spectroscopy, elemental analysis and X-ray diffraction studies. The compound 1 consists of [Ni(H2O)6]2+, [Ni(bipy)(H2O)4]2+, two symmetry-independent anionic complexes [Ni(pydc)2]2- and six co-crystallized water molecules. In the crystal structure of compound 1, the formation of extensive O-H…O hydrogen bonds between uncoordinated water molecules and cationic or anionic complexes play important roles in stabilizing the corresponding lattice and formation of 3-dimensional networks.
Related Concept Videos
Formation of Complex Ions
Precipitation Gravimetry
In determining nickel by gravimetric analysis, a precipitant of ethanolic dimethylglyoxime is added to a hot nickel salt solution. This is quickly followed by the dropwise addition of dilute ammonia solution until precipitation occurs. A...
Valence Bond Theory
Coordination Compounds and Nomenclature
Metal-Ligand Bonds
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...
Complexation Equilibria: The Chelate Effect

