XPS and Chiroptical Studies on Lanthanide(III) Complexes of Hydroxylamine and Sodium D‐Camphor‐β‐sulfonate

Abstract

Six new chiral complexes LnL3 (Ln = La(III), Pr(III), Nd(III), Sm(III), Eu(III) and Gd(III)) with an optically active Schiff base ligand (HL) derived from sodium D‐camphor‐β‐sulfonate and hydroxylamine were synthesized and characterized by elemental analyses, molar conductance, IR, XPS (X‐ray photoelectron spectroscopy), electronic spectra, 1H NMR, magnetic susceptibility measurements and thermal methods. It was found that the complexes behave as non‐electrolytes in CH3OH and in DMSO and possess the stoichiometric ratio of Ln:C:N:O:S = 0.33:10.1:1.0:4.0:1.0 which is consistent with the analytical data. Their dominant conformers were determined by CD spectra. A six‐coordinated model is proposed for these complexes.