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Coordination chemical studies on Cu II Complexes of some derivatives of 4‐hydroxy‐2(1H) quinolones
Author(s) -
Hassanein M.,
AbuElWafa S. M.
Publication year - 1989
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.19895700115
Subject(s) - chemistry , octahedron , magnetic moment , crystallography , ligand field theory , ligand (biochemistry) , metal , paramagnetism , electron paramagnetic resonance , ion , substituent , ring (chemistry) , resonance (particle physics) , octahedral symmetry , absorption spectroscopy , spectral line , stereochemistry , nuclear magnetic resonance , crystal structure , atomic physics , biochemistry , physics , receptor , organic chemistry , quantum mechanics , astronomy , condensed matter physics
Cu II complexes of some derivatives of 4‐hydroxy‐2(1H) quinolones with different 1(x) −3(y) groups attached to quinolone ring have been synthesised and characterised by elemental analysis, conductance, ir spectra and formation constants. Measurements of ligand field and electron paramagnetic resonance spectra as well as magnetic moments were also carried out. Generally, the obtained spectral results (electronic absorption energies and g values) showed that Cu II ions are present in an axial elongated symmetry D 4h (tetragonally distorted octahedron or square planar) depending on 3(y) substituent. Moreover, the relatively low magnetic moment values ( < 1.74 B.M.) measured at room temperature and some calculated G values ( < 4.0) suggested the presence of an appreciable metal‐metal interaction.