Synthesis and characterization of mixed ligand metal(II) complexes with Schiff base and 8-hydroxyquinoline as ligands
Co(II), Ni(II) and Cu(II) mixed ligand complexes have been synthesized from a Schiff base (L) obtained by the condensation reaction of acetophenone and 2-aminophenol, as primary ligand and 8-hydroxyquinoline (HQ) as secondary ligand. The Schiff base and metal(II) mixed ligand complexes were accordin...
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Iranian Chemical Science and Technologies Association
2021-02-01
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| Series: | Journal of Chemistry Letters |
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| Online Access: | https://www.jchemlett.com/article_134687_3ccd71a63706468d067897f3302e1a25.pdf |
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| author | Abubakar Abdullahi Ahmed Joy Peter Fatima Ngaramu |
| author_facet | Abubakar Abdullahi Ahmed Joy Peter Fatima Ngaramu |
| author_sort | Abubakar Abdullahi Ahmed |
| collection | DOAJ |
| description | Co(II), Ni(II) and Cu(II) mixed ligand complexes have been synthesized from a Schiff base (L) obtained by the condensation reaction of acetophenone and 2-aminophenol, as primary ligand and 8-hydroxyquinoline (HQ) as secondary ligand. The Schiff base and metal(II) mixed ligand complexes were accordingly investigated using some physicochemical techniques. The Schiff base ligand was shiny brown crystalline solid obtained in low yield of 36.21 % with melting point of 240 oC. The metal(II) complexes were obtained as brown to deep brown coloured solids, air stable with decomposition temperature of 310 – 340 oC. The molar conductivity values of the complexes in dimethylformamide (DMF) was found to be 2.13 - 3.77 Ohm-1cm2mol-1 indicating their non-electrolytic nature. The determination of water of crystallization showed presence of 1½ uncoordinated water molecules in the Co(II) and Cu(II) complexes while 2 was estimated for Ni(II) complex. The infrared spectral data allude that, on complexation, the Schiff base ligand loses its phenolic hydrogen and coordinated bidentately to the metal(II) ions through deprotonated phenolic oxygen and imine nitrogen (HC=N-) as monobasic ligand. Similarly, HQ coordinated via deprotonated phenolic oxygen and quinoline nitrogen. The resultant data showed that the mixed ligand might be formulated as [ML(HQ)].nH2O exhibiting four-coordinate square planar geometry. |
| format | Article |
| id | doaj-art-48d92a229abb4d37bf98c7d9dbf09cfb |
| institution | OA Journals |
| issn | 2821-0123 2717-1892 |
| language | English |
| publishDate | 2021-02-01 |
| publisher | Iranian Chemical Science and Technologies Association |
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| series | Journal of Chemistry Letters |
| spelling | doaj-art-48d92a229abb4d37bf98c7d9dbf09cfb2025-08-20T01:55:53ZengIranian Chemical Science and Technologies AssociationJournal of Chemistry Letters2821-01232717-18922021-02-0121434910.22034/jchemlett.2021.292242.1034134687Synthesis and characterization of mixed ligand metal(II) complexes with Schiff base and 8-hydroxyquinoline as ligandsAbubakar Abdullahi Ahmed0Joy Peter1Fatima Ngaramu2Department of Pure and Applied Chemistry, Faculty of Science, University of Maiduguri, Borno State, NigeriaDepartment of Pure and Applied Chemistry, Faculty of Science, University of Maiduguri, Borno State, NigeriaDepartment of Pure and Applied Chemistry, Faculty of Science, University of Maiduguri, Borno State, NigeriaCo(II), Ni(II) and Cu(II) mixed ligand complexes have been synthesized from a Schiff base (L) obtained by the condensation reaction of acetophenone and 2-aminophenol, as primary ligand and 8-hydroxyquinoline (HQ) as secondary ligand. The Schiff base and metal(II) mixed ligand complexes were accordingly investigated using some physicochemical techniques. The Schiff base ligand was shiny brown crystalline solid obtained in low yield of 36.21 % with melting point of 240 oC. The metal(II) complexes were obtained as brown to deep brown coloured solids, air stable with decomposition temperature of 310 – 340 oC. The molar conductivity values of the complexes in dimethylformamide (DMF) was found to be 2.13 - 3.77 Ohm-1cm2mol-1 indicating their non-electrolytic nature. The determination of water of crystallization showed presence of 1½ uncoordinated water molecules in the Co(II) and Cu(II) complexes while 2 was estimated for Ni(II) complex. The infrared spectral data allude that, on complexation, the Schiff base ligand loses its phenolic hydrogen and coordinated bidentately to the metal(II) ions through deprotonated phenolic oxygen and imine nitrogen (HC=N-) as monobasic ligand. Similarly, HQ coordinated via deprotonated phenolic oxygen and quinoline nitrogen. The resultant data showed that the mixed ligand might be formulated as [ML(HQ)].nH2O exhibiting four-coordinate square planar geometry.https://www.jchemlett.com/article_134687_3ccd71a63706468d067897f3302e1a25.pdfcomplexationnon-electrolytebidentateuncoordinated water |
| spellingShingle | Abubakar Abdullahi Ahmed Joy Peter Fatima Ngaramu Synthesis and characterization of mixed ligand metal(II) complexes with Schiff base and 8-hydroxyquinoline as ligands Journal of Chemistry Letters complexation non-electrolyte bidentate uncoordinated water |
| title | Synthesis and characterization of mixed ligand metal(II) complexes with Schiff base and 8-hydroxyquinoline as ligands |
| title_full | Synthesis and characterization of mixed ligand metal(II) complexes with Schiff base and 8-hydroxyquinoline as ligands |
| title_fullStr | Synthesis and characterization of mixed ligand metal(II) complexes with Schiff base and 8-hydroxyquinoline as ligands |
| title_full_unstemmed | Synthesis and characterization of mixed ligand metal(II) complexes with Schiff base and 8-hydroxyquinoline as ligands |
| title_short | Synthesis and characterization of mixed ligand metal(II) complexes with Schiff base and 8-hydroxyquinoline as ligands |
| title_sort | synthesis and characterization of mixed ligand metal ii complexes with schiff base and 8 hydroxyquinoline as ligands |
| topic | complexation non-electrolyte bidentate uncoordinated water |
| url | https://www.jchemlett.com/article_134687_3ccd71a63706468d067897f3302e1a25.pdf |
| work_keys_str_mv | AT abubakarabdullahiahmed synthesisandcharacterizationofmixedligandmetaliicomplexeswithschiffbaseand8hydroxyquinolineasligands AT joypeter synthesisandcharacterizationofmixedligandmetaliicomplexeswithschiffbaseand8hydroxyquinolineasligands AT fatimangaramu synthesisandcharacterizationofmixedligandmetaliicomplexeswithschiffbaseand8hydroxyquinolineasligands |