<b>Copper(II) complexes of <i>o</i>-vanillin acetylhydrazone (H<sub>2</sub>L) and the single-crystal X-ray structure of [{Cu(HL)(H<sub>2</sub>O)(Hpz)}].NO<sub>3</sub></b>
A hydrazonic ligand, <i>o</i>-vanillin acetylhydrazone (H<sub>2</sub>L) has been prepared and used as chelating agent towards copper(II) ion. The ligand acts like a tridentate ligand in the monodeprotonated (HL-) and dideprotonated (L<sup>2-</sup>) states. Monoani...
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| Format: | Article |
| Language: | English |
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Chemical Society of Ethiopia
2006-06-01
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| Series: | Bulletin of the Chemical Society of Ethiopia |
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| Online Access: | http://www.ajol.info/index.php/bcse/article/view/21141 |
| _version_ | 1811266603050860544 |
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| author | Ousmane Diouf Mohamed Gaye Diariétou Gningue Sall Abdou Salam Sall Yves Pontillon Andrea Caneschi |
| author_facet | Ousmane Diouf Mohamed Gaye Diariétou Gningue Sall Abdou Salam Sall Yves Pontillon Andrea Caneschi |
| author_sort | Ousmane Diouf |
| collection | DOAJ |
| description | A hydrazonic ligand, <i>o</i>-vanillin acetylhydrazone (H<sub>2</sub>L) has been prepared and used as chelating agent towards copper(II) ion. The ligand acts like a tridentate ligand in the monodeprotonated (HL-) and dideprotonated (L<sup>2-</sup>) states. Monoanionic complexes [{Cu(HL)(H<sub>2</sub>O)}<sub>2</sub>]•2BF<sub>4</sub> and [{Cu(HL)(Hpz)(H<sub>2</sub>O)}]•NO<sub>3</sub> have been isolated. After neutralization the complex [{Cu(L)}<sub>2</sub>].5/2H<sub>2</sub>O is obtained. These complexes have been characterized by a range of physicochemical and spectroscopic studies. The X-ray crystal structure of the mononuclear complex [{Cu(HL)(Hpz)(H<sub>2</sub>O)}]•NO<sub>3</sub> was also determined. This crystal is orthorombic with the space group I222, <i>a</i> = 13.417(3), <i>b</i> = 22.662(6), <i>c</i> = 22.518(5) Å, α = β = γ = 90° and Z = 8. The copper ion has a square-pyramidal geometry with the basal donors atoms from the tridentate ligand (ONO) and the pyrazole (N), the apical position being occupied by a coordinated water molecule weakly linked to the copper(II) center. The binuclear complexes exhibit interesting magnetic properties. |
| first_indexed | 2024-04-12T20:45:11Z |
| format | Article |
| id | doaj.art-a73a55d415fa4fb89a37714399ddf019 |
| institution | Directory Open Access Journal |
| issn | 1011-3924 1726-801X |
| language | English |
| last_indexed | 2024-04-12T20:45:11Z |
| publishDate | 2006-06-01 |
| publisher | Chemical Society of Ethiopia |
| record_format | Article |
| series | Bulletin of the Chemical Society of Ethiopia |
| spelling | doaj.art-a73a55d415fa4fb89a37714399ddf0192022-12-22T03:17:17ZengChemical Society of EthiopiaBulletin of the Chemical Society of Ethiopia1011-39241726-801X2006-06-012013543<b>Copper(II) complexes of <i>o</i>-vanillin acetylhydrazone (H<sub>2</sub>L) and the single-crystal X-ray structure of [{Cu(HL)(H<sub>2</sub>O)(Hpz)}].NO<sub>3</sub></b>Ousmane DioufMohamed GayeDiariétou Gningue SallAbdou Salam SallYves PontillonAndrea CaneschiA hydrazonic ligand, <i>o</i>-vanillin acetylhydrazone (H<sub>2</sub>L) has been prepared and used as chelating agent towards copper(II) ion. The ligand acts like a tridentate ligand in the monodeprotonated (HL-) and dideprotonated (L<sup>2-</sup>) states. Monoanionic complexes [{Cu(HL)(H<sub>2</sub>O)}<sub>2</sub>]•2BF<sub>4</sub> and [{Cu(HL)(Hpz)(H<sub>2</sub>O)}]•NO<sub>3</sub> have been isolated. After neutralization the complex [{Cu(L)}<sub>2</sub>].5/2H<sub>2</sub>O is obtained. These complexes have been characterized by a range of physicochemical and spectroscopic studies. The X-ray crystal structure of the mononuclear complex [{Cu(HL)(Hpz)(H<sub>2</sub>O)}]•NO<sub>3</sub> was also determined. This crystal is orthorombic with the space group I222, <i>a</i> = 13.417(3), <i>b</i> = 22.662(6), <i>c</i> = 22.518(5) Å, α = β = γ = 90° and Z = 8. The copper ion has a square-pyramidal geometry with the basal donors atoms from the tridentate ligand (ONO) and the pyrazole (N), the apical position being occupied by a coordinated water molecule weakly linked to the copper(II) center. The binuclear complexes exhibit interesting magnetic properties.http://www.ajol.info/index.php/bcse/article/view/21141Copper(II) complexesTridentate ligand<i>o</i>-Vanillin acetylhydrazoneX-Ray crystal structure |
| spellingShingle | Ousmane Diouf Mohamed Gaye Diariétou Gningue Sall Abdou Salam Sall Yves Pontillon Andrea Caneschi <b>Copper(II) complexes of <i>o</i>-vanillin acetylhydrazone (H<sub>2</sub>L) and the single-crystal X-ray structure of [{Cu(HL)(H<sub>2</sub>O)(Hpz)}].NO<sub>3</sub></b> Bulletin of the Chemical Society of Ethiopia Copper(II) complexes Tridentate ligand <i>o</i>-Vanillin acetylhydrazone X-Ray crystal structure |
| title | <b>Copper(II) complexes of <i>o</i>-vanillin acetylhydrazone (H<sub>2</sub>L) and the single-crystal X-ray structure of [{Cu(HL)(H<sub>2</sub>O)(Hpz)}].NO<sub>3</sub></b> |
| title_full | <b>Copper(II) complexes of <i>o</i>-vanillin acetylhydrazone (H<sub>2</sub>L) and the single-crystal X-ray structure of [{Cu(HL)(H<sub>2</sub>O)(Hpz)}].NO<sub>3</sub></b> |
| title_fullStr | <b>Copper(II) complexes of <i>o</i>-vanillin acetylhydrazone (H<sub>2</sub>L) and the single-crystal X-ray structure of [{Cu(HL)(H<sub>2</sub>O)(Hpz)}].NO<sub>3</sub></b> |
| title_full_unstemmed | <b>Copper(II) complexes of <i>o</i>-vanillin acetylhydrazone (H<sub>2</sub>L) and the single-crystal X-ray structure of [{Cu(HL)(H<sub>2</sub>O)(Hpz)}].NO<sub>3</sub></b> |
| title_short | <b>Copper(II) complexes of <i>o</i>-vanillin acetylhydrazone (H<sub>2</sub>L) and the single-crystal X-ray structure of [{Cu(HL)(H<sub>2</sub>O)(Hpz)}].NO<sub>3</sub></b> |
| title_sort | b copper ii complexes of i o i vanillin acetylhydrazone h sub 2 sub l and the single crystal x ray structure of cu hl h sub 2 sub o hpz no sub 3 sub b |
| topic | Copper(II) complexes Tridentate ligand <i>o</i>-Vanillin acetylhydrazone X-Ray crystal structure |
| url | http://www.ajol.info/index.php/bcse/article/view/21141 |
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