Spectral properties of some metal complexes derived from uracil–thiouracil and citrazinic acid compounds

Spectral properties of some metal complexes derived from uracil–thiouracil and citrazinic acid... The reaction of FeCl 3 with uracil (H 2 L 1 ), citrazinic acid (H 2 L 6 ), 5-(phenylazo)citrazinic acid (H 2 L 7 ), 5-( m -hydroxyphenylazo)citrazinic acid (H 2 L 8 ) and 5-( m -nitrophenylazo)citrazinic acid (H 2 L 9 ) leads to the formation of complexes with the empirical formula Fe(HL) 3 · n H 2 O ( n = 1–3). All of the prepared complexes have octahedral complexation geometry where the azo group is not the reactive site for complexation. Thiouracil (H 2 L 2 ) and the 5-(substituted phenylazo)thiouracil (H 2 L 3 –H 2 L 5 ) ligands are bidentates on complexation with Co(II), Ni(II) and Cu(II). The complexes have been characterized by elemental analyses, IR, electronic spectra, magnetic susceptibility, DTA, electron spin resonance (copper complexes) and Mössbauer spectra (iron complexes). The coordination bond lengths between the metal ion and the active centers for complexation were calculated. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy Elsevier

Spectral properties of some metal complexes derived from uracil–thiouracil and citrazinic acid compounds

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Publisher
Elsevier
Copyright
Copyright © 2006 Elsevier B.V.
ISSN
1386-1425
D.O.I.
10.1016/j.saa.2006.07.046
Publisher site
See Article on Publisher Site

Abstract

The reaction of FeCl 3 with uracil (H 2 L 1 ), citrazinic acid (H 2 L 6 ), 5-(phenylazo)citrazinic acid (H 2 L 7 ), 5-( m -hydroxyphenylazo)citrazinic acid (H 2 L 8 ) and 5-( m -nitrophenylazo)citrazinic acid (H 2 L 9 ) leads to the formation of complexes with the empirical formula Fe(HL) 3 · n H 2 O ( n = 1–3). All of the prepared complexes have octahedral complexation geometry where the azo group is not the reactive site for complexation. Thiouracil (H 2 L 2 ) and the 5-(substituted phenylazo)thiouracil (H 2 L 3 –H 2 L 5 ) ligands are bidentates on complexation with Co(II), Ni(II) and Cu(II). The complexes have been characterized by elemental analyses, IR, electronic spectra, magnetic susceptibility, DTA, electron spin resonance (copper complexes) and Mössbauer spectra (iron complexes). The coordination bond lengths between the metal ion and the active centers for complexation were calculated.

Journal

Spectrochimica Acta Part A: Molecular and Biomolecular SpectroscopyElsevier

Published: Jul 1, 2007

References

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