98603-68-0Relevant academic research and scientific papers
Some water-soluble Schiff-base complexes of nickel(II): The role of water
Evans, Dennis F.,Missen, Paul H.
, p. 1451 - 1454 (1985)
Disodium nickelate(II), Na2, and disodium bisnickelate(II) have been prepared.Electronic spectra and magnetic susceptibility measurements show that in aqueous solution there is an equilibrium between the square-planar forms and six-co-ordinate species produced by co-ordination of two water molecules.Thermodinamic parameters are reported for the Na2 system.The room-temperature i.r. spectrum of solid (diamagnetic) Na2*2H2O gives two well resolved bands in the O-H stretching region.One of these is extremely sharp (bandwidth 16 cm-1) and occurs at an unusually high frequency (3630 cm-1).The i.r. spectra of samples having various extents of deuteriation show that the two water molecules are crystallographically equivalent, with C1 site symmetry.In each H2O, one hydrogen atom is almost non-hydrogen-bonded while the other is involved in a hydrogen bond of moderate strength.
