oa South African Journal of Chemistry - Isolation, characterization and X-ray structure determination of the Schiff base ligand : 5-methyl-2-phenyl-4-[phenyl-(4-phenyl-thiazol-2-ylamino)-methylene]-2,4-dihydro-pyrazol-3-one : research article
|Article Title||Isolation, characterization and X-ray structure determination of the Schiff base ligand : 5-methyl-2-phenyl-4-[phenyl-(4-phenyl-thiazol-2-ylamino)-methylene]-2,4-dihydro-pyrazol-3-one : research article|
|© Publisher:||South African Chemical Institute (SACI)|
|Journal||South African Journal of Chemistry|
|Affiliations||1 University of KwaZulu-Natal, 2 University of KwaZulu-Natal, 3 Navjivan Science College, India and 4 Navjivan Science College, India|
|Publication Date||Jan 2015|
|Pages||39 - 44|
|Keyword(s)||Pyrazolone, Schiff base, Tautomer, Thiazole and X-ray structure|
The structure of the amine tautomer of the new Schiff base derived from 4-benzoyl-5-methyl-2-phenyl-2,4-dihydro-pyrazol-3-one (2) and 4-phenyl-thiazol-2-ylamine (3) was confirmed by means of single crystal X-ray diffraction. The title compound (4) was synthesized and crystals were grown from a mixture of dichloromethane and n-hexane (1:3). Single crystal X-ray diffraction analysis show that the structure is primarily stabilized by strong intramolecular N3-H3A···O1 hydrogen bonds [N3-H3A = 0.883(19) Å, H3A···O1=1.925(18) Å, N3···O1=2.6901(13) Å, with an angle for N3-H3A···O1=144.1(17) Å] and this leads to the formation of a pseudo nine-membered hydrogen bonded pattern. Elemental analysis, FTIR and NMR analyses have been employed to characterize the crystal.
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