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Synthesis and Characterisation of Cobalt(II) Complexes of 3-Hydroxyflavone

The syn theses of diaquabis (3-hydroxyflavonato) cobalt(II) and bis(pyridine) bis (3hydroxyflavonato) cobalt(II) are described. Results from infrared spectra clearly show that the 3-hydroxyflavonato anion forms a chelate through the 3-hydroxy 4-keto groups. The electronic spectra of both complexe...

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Main Authors: Yang, Farina, D. A., Rice
Format: Article
Language:English
English
Published: Universiti Putra Malaysia Press 1995
Online Access:http://psasir.upm.edu.my/id/eprint/3864/1/Synthesis_and_Characterisation_of_Cobalt%28II%29.pdf
http://psasir.upm.edu.my/id/eprint/3864/
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spelling my.upm.eprints.38642013-05-27T07:11:51Z http://psasir.upm.edu.my/id/eprint/3864/ Synthesis and Characterisation of Cobalt(II) Complexes of 3-Hydroxyflavone Yang, Farina D. A., Rice The syn theses of diaquabis (3-hydroxyflavonato) cobalt(II) and bis(pyridine) bis (3hydroxyflavonato) cobalt(II) are described. Results from infrared spectra clearly show that the 3-hydroxyflavonato anion forms a chelate through the 3-hydroxy 4-keto groups. The electronic spectra of both complexes indicate that cobalt(II) has an octahedral geometry. Quantitative analyses of the isolated products gave good agreement with calculated values. Magnetic moment measurements show that both compounds are high spin £ cobalt(II) complexes. The powder diffraction pattern of the pyridine adduct gave almost 1:1 correspondence with tTans-bis (pyridine) bis (3-hydroxyflavonato) nickel (II) which has an octahedral geometry. Therefore, it is highly likely that bis(pyridine)bis(3hydroxyflavonato) cobalt(II) is octahedrally co-ordinated with two chelating 3-hydroxyflavonato anions and two pyridine molecules occupying tTans positions. Universiti Putra Malaysia Press 1995 Article PeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/3864/1/Synthesis_and_Characterisation_of_Cobalt%28II%29.pdf Yang, Farina and D. A., Rice (1995) Synthesis and Characterisation of Cobalt(II) Complexes of 3-Hydroxyflavone. Pertanika Journal of Science & Technology, 3 (2). pp. 211-219. ISSN 0128-7680 English
institution Universiti Putra Malaysia
building UPM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Putra Malaysia
content_source UPM Institutional Repository
url_provider http://psasir.upm.edu.my/
language English
English
description The syn theses of diaquabis (3-hydroxyflavonato) cobalt(II) and bis(pyridine) bis (3hydroxyflavonato) cobalt(II) are described. Results from infrared spectra clearly show that the 3-hydroxyflavonato anion forms a chelate through the 3-hydroxy 4-keto groups. The electronic spectra of both complexes indicate that cobalt(II) has an octahedral geometry. Quantitative analyses of the isolated products gave good agreement with calculated values. Magnetic moment measurements show that both compounds are high spin £ cobalt(II) complexes. The powder diffraction pattern of the pyridine adduct gave almost 1:1 correspondence with tTans-bis (pyridine) bis (3-hydroxyflavonato) nickel (II) which has an octahedral geometry. Therefore, it is highly likely that bis(pyridine)bis(3hydroxyflavonato) cobalt(II) is octahedrally co-ordinated with two chelating 3-hydroxyflavonato anions and two pyridine molecules occupying tTans positions.
format Article
author Yang, Farina
D. A., Rice
spellingShingle Yang, Farina
D. A., Rice
Synthesis and Characterisation of Cobalt(II) Complexes of 3-Hydroxyflavone
author_facet Yang, Farina
D. A., Rice
author_sort Yang, Farina
title Synthesis and Characterisation of Cobalt(II) Complexes of 3-Hydroxyflavone
title_short Synthesis and Characterisation of Cobalt(II) Complexes of 3-Hydroxyflavone
title_full Synthesis and Characterisation of Cobalt(II) Complexes of 3-Hydroxyflavone
title_fullStr Synthesis and Characterisation of Cobalt(II) Complexes of 3-Hydroxyflavone
title_full_unstemmed Synthesis and Characterisation of Cobalt(II) Complexes of 3-Hydroxyflavone
title_sort synthesis and characterisation of cobalt(ii) complexes of 3-hydroxyflavone
publisher Universiti Putra Malaysia Press
publishDate 1995
url http://psasir.upm.edu.my/id/eprint/3864/1/Synthesis_and_Characterisation_of_Cobalt%28II%29.pdf
http://psasir.upm.edu.my/id/eprint/3864/
_version_ 1643822736264396800
score 13.211869

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