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Evidence for equatorial and axial copper(II)-thioether interactions by means of electronic spectroscopy

Authors
Journal
Spectrochimica Acta Part A Molecular Spectroscopy
0584-8539
Publisher
Elsevier
Publication Date
Volume
39
Issue
7
Identifiers
DOI: 10.1016/0584-8539(83)80038-5

Abstract

Abstract The degree of Cu(II)-thioether interaction has been studied in some Cu(thiadiamine)·X 2 and Cu(thiadiamine)·YZ complexes (X − = NO − 3, ClO − 4; Z − = OAc −; Y − = ClO − 4). Evidence for strong equatorial Cu(II)-S bonding may be obtained from the energy of the σ(S) → Cu(II) ligand to metal charge-transfer transition (LMCT) as well as from an X-ray photoelectron spectroscopic determination of the binding energy shifts in the S 2 p levels. Weaker axial Cu(II)-S interaction can however only be detected by the study of LMCT spectra as the charge differences induced on the S atoms become too small to be revealed by ESCA.

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