Ligand-Field Analysis of Low-Spin N,N'-Propylenebis(naphthyldiiminate)nickel(II) in Ethanol Solution

摘要

Titled complex denoted as [Ni(nappn)]centre dot0.5H_2O,where H2nappn is tetradentate Schiff base: l,3-bis(naphthylideneimine)propane,has been characterized by elemental analysis,molar conductivity,ultraviolet (UV) and visible (Vis) spectroscopy.The known X-ray structure of this complex shows that Ni atom adopts square-planar coordination.Combined multi-technique experiments have been applled to establish the structure of complex in solution.The molar conductivity value indicates non-electrolytic properties of solution studied The spectroscopic measurements were used to study the coordination properties of donor-atoms and their bonding abilities.Ail the experimental transition energies are derived from Gaussian analysis of the solution spectrum.The d-d transition energies were used to derive the angular overlap model (AOM) and crystal-field model (CFM) parameters for the studied complex in D_(4h) symmetry.The first full ligand-field interpretation of the low-spin Schiff base nickel(II) complex in solution has been presented.