Symmetrical and Unsymmetrical Schiff Bases Derived from 3,4-Diaminobenzophenone: Synthesis and Thermodynamics of Five Coordinated Tertiaryphosphine Cobalt(III) Complexes
Some new cobalt(III) complexes described as [Co(Chel)(PBu<sub>3</sub>)]ClO<sub>4</sub> × H<sub>2</sub>O where (Chel) is the deprotonated form of a series of symmetric and unsymmetrical Schiff base ligands containing 3,4-diaminobenzophenone (3,4-DABP) and substitut...
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Croatian Chemical Society
2016-09-01
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| Series: | Croatica Chemica Acta |
| Online Access: | http://hrcak.srce.hr/file/246129 |
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| author | Khosro Mohammadi Mozaffar Asadi Moslem Setoodeh Khah Hajar Sepehrpour |
| author_facet | Khosro Mohammadi Mozaffar Asadi Moslem Setoodeh Khah Hajar Sepehrpour |
| author_sort | Khosro Mohammadi |
| collection | DOAJ |
| description | Some new cobalt(III) complexes described as [Co(Chel)(PBu<sub>3</sub>)]ClO<sub>4</sub> × H<sub>2</sub>O where (Chel) is the deprotonated form of a series of symmetric and unsymmetrical Schiff base ligands containing 3,4-diaminobenzophenone (3,4-DABP) and substituted salicylaldehyde moieties and [Co(Chel)(PMePh<sub>2</sub>)]ClO<sub>4</sub> × H<sub>2</sub>O where (Chel) is [N’-(5-BrSalDABP)] were synthesized and characterized by 1H NMR, IR, UV–Vis spectroscopy, and elemental analysis. The formation constants and the thermodynamic parameters were determined spectrophotometrically for 1: 1 adduct formation of the new complexes as acceptor with some aliphatic amines such as benzylamine, n-butylamine, sec-butylamine and tert-butylamine as donors in DMSO solvent in constant ionic strength (I = 0.1 M NaClO4). The formation constants change according to the following trend due to the steric and the electronic factors of the cobalt(III) complexes: N’-5-OMe > N’-5-H > N’-5-Br > N’-5-Cl; N,N’-3-OMe > N,N’-4-Ome.
The trend of the formation constants of cobalt(III) Schiff base complexes toward a given donor according to the axial ligand is as follow: PBu3 > PMePh<sub>2</sub>. Also, the following binding trend of the donors toward a given cobalt(III) Schiff base complex is obtained: benzylamine >
<i>n</i>-butylamine > <i>sec</i>-butylamine > <i>tert</i>-butylamine.
<br><a rel="license" href="http://creativecommons.org/licenses/by/4.0/"><img alt="Creative Commons License" style="border-width:0" src="https://i.creativecommons.org/l/by/4.0/80x15.png" /></a> This work is licensed under a <a rel="license" href="http://creativecommons.org/licenses/by/4.0/">Creative Commons Attribution 4.0 International License</a>. |
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| spelling | doaj.art-c34eef91f0c64fd589b5625327311d0e2022-12-21T19:31:35ZengCroatian Chemical SocietyCroatica Chemica Acta0011-16431334-417X2016-09-0189327728410.5562/cca2706166911Symmetrical and Unsymmetrical Schiff Bases Derived from 3,4-Diaminobenzophenone: Synthesis and Thermodynamics of Five Coordinated Tertiaryphosphine Cobalt(III) ComplexesKhosro Mohammadi0Mozaffar Asadi1Moslem Setoodeh Khah2Hajar Sepehrpour3Chemistry Department, Faculty of Sciences, Persian Gulf University, Bushehr 75169, I.R. IranChemistry Department, College of Sciences, Shiraz University, Shiraz 71454, I.R. IranDepartment of Inorganic Chemistry, Faculty of Chemistry, University of Kashan, Kashan, 87317-51167 I.R IranChemistry Department, College of Sciences, Shiraz University, Shiraz 71454, I.R. IranSome new cobalt(III) complexes described as [Co(Chel)(PBu<sub>3</sub>)]ClO<sub>4</sub> × H<sub>2</sub>O where (Chel) is the deprotonated form of a series of symmetric and unsymmetrical Schiff base ligands containing 3,4-diaminobenzophenone (3,4-DABP) and substituted salicylaldehyde moieties and [Co(Chel)(PMePh<sub>2</sub>)]ClO<sub>4</sub> × H<sub>2</sub>O where (Chel) is [N’-(5-BrSalDABP)] were synthesized and characterized by 1H NMR, IR, UV–Vis spectroscopy, and elemental analysis. The formation constants and the thermodynamic parameters were determined spectrophotometrically for 1: 1 adduct formation of the new complexes as acceptor with some aliphatic amines such as benzylamine, n-butylamine, sec-butylamine and tert-butylamine as donors in DMSO solvent in constant ionic strength (I = 0.1 M NaClO4). The formation constants change according to the following trend due to the steric and the electronic factors of the cobalt(III) complexes: N’-5-OMe > N’-5-H > N’-5-Br > N’-5-Cl; N,N’-3-OMe > N,N’-4-Ome. The trend of the formation constants of cobalt(III) Schiff base complexes toward a given donor according to the axial ligand is as follow: PBu3 > PMePh<sub>2</sub>. Also, the following binding trend of the donors toward a given cobalt(III) Schiff base complex is obtained: benzylamine > <i>n</i>-butylamine > <i>sec</i>-butylamine > <i>tert</i>-butylamine. <br><a rel="license" href="http://creativecommons.org/licenses/by/4.0/"><img alt="Creative Commons License" style="border-width:0" src="https://i.creativecommons.org/l/by/4.0/80x15.png" /></a> This work is licensed under a <a rel="license" href="http://creativecommons.org/licenses/by/4.0/">Creative Commons Attribution 4.0 International License</a>.http://hrcak.srce.hr/file/246129 |
| spellingShingle | Khosro Mohammadi Mozaffar Asadi Moslem Setoodeh Khah Hajar Sepehrpour Symmetrical and Unsymmetrical Schiff Bases Derived from 3,4-Diaminobenzophenone: Synthesis and Thermodynamics of Five Coordinated Tertiaryphosphine Cobalt(III) Complexes Croatica Chemica Acta |
| title | Symmetrical and Unsymmetrical Schiff Bases Derived from 3,4-Diaminobenzophenone: Synthesis and Thermodynamics of Five Coordinated Tertiaryphosphine Cobalt(III) Complexes |
| title_full | Symmetrical and Unsymmetrical Schiff Bases Derived from 3,4-Diaminobenzophenone: Synthesis and Thermodynamics of Five Coordinated Tertiaryphosphine Cobalt(III) Complexes |
| title_fullStr | Symmetrical and Unsymmetrical Schiff Bases Derived from 3,4-Diaminobenzophenone: Synthesis and Thermodynamics of Five Coordinated Tertiaryphosphine Cobalt(III) Complexes |
| title_full_unstemmed | Symmetrical and Unsymmetrical Schiff Bases Derived from 3,4-Diaminobenzophenone: Synthesis and Thermodynamics of Five Coordinated Tertiaryphosphine Cobalt(III) Complexes |
| title_short | Symmetrical and Unsymmetrical Schiff Bases Derived from 3,4-Diaminobenzophenone: Synthesis and Thermodynamics of Five Coordinated Tertiaryphosphine Cobalt(III) Complexes |
| title_sort | symmetrical and unsymmetrical schiff bases derived from 3 4 diaminobenzophenone synthesis and thermodynamics of five coordinated tertiaryphosphine cobalt iii complexes |
| url | http://hrcak.srce.hr/file/246129 |
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