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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

 

Abstract

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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/content/chem/68/1/EJC165611
2015-01-01
2016-12-04
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