3-[1-(4-Sulfamoylphenyl)-5-p-tolyl-1H-pyrazol-3-yl]propanoic acid and 3-[5-(4-bromophenyl)-1-(4-sulfamoylphenyl)-1H-pyrazol-3-yl]propanoic acid–dichloromethane–diethyl ether–water (2/0.72/1/1)
AUTOR(ES)
Kumarasinghe, Isuru R.
FONTE
International Union of Crystallography
RESUMO
The syntheses of 3-[1-(4-sulfamoylphenyl)-5-p-tolyl-1H-pyrazol-3-yl]propanoic acid, C19H19N3O4S, (I), and 3-[5-(4-bromophenyl)-1-(4-sulfamoylphenyl)-1H-pyrazol-3-yl]propanoic acid–dichloromethane–diethyl ether–water (2/0.72/1/1), 2C18H16BrN3O4S·0.72CH2Cl2·C4H10O·H2O, (II), are regiospecific. However, correct identification by spectroscopic techniques of the regioisomer formed is not trivial and single-crystal X-ray analysis provided the only means of unambiguous structure determination. Both structures make extensive use of hydrogen bonding and while compound (I) forms a straightforward unsolvated Z′ = 1 structure, compound (II) crystallizes as an unusual mixed solvate, with two crystallographically unique molecules of the pyrazole derivative present in the asymmetric unit. The structure of (II) also features Br⋯Br interactions.
ACESSO AO ARTIGO
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