Dibromidobis(4-hydroxy-1,5-dimethyl-2-phenyl-3-pyrazolone)zinc(II)

Abstract

In the title compound, [ZnBr2(C11H12N2O2)2], the Zn(II) ion is coordinated by two Br atoms and two O atoms from two 4-hydroxy­anti­pyrine mol­ecules via the carbonyl O atoms, which act as monodentate ligands, giving rise to a distorted tetra­hedral geometry. The values of the bond angles at the Zn atom are in the range 99.4 (1) to 113.2 (1)°. The presence of O—H⋯O and O—H⋯Br intra­molecular hydrogen bonds can explain the difference between the two Zn—O [1.961 (3)/2.015 (3) Å] and the two Zn—Br [2.350 (1)/2.378 (1) Å] bond lengths. The crystal structure is governed by C—H⋯O, C—H⋯Br and Zn—Br⋯Cg(π-ring) inter­actions.

Crystal structure of 3,4-dihydroxy-1,5-dimethyl-2-phenylpyrazolium chloride, [C11H13N2O2]Cl

“…Together with 3-hydroxyantipyrine and 4,4'-dihydroxyantipyrine, they are excreted in free form or as glycoconjugates [2]. Beside our works on metal complexes based on the antipyrine skeleton [3,4], we had prepared anew derivate of 4-hydroxyantipyrine, starting from the reaction of titanium tetrachoride and an acetonitrile solution of 4-hydroxyantipyrine. The molecule consists of aC l -anion and ac ation formed by a pyrazol ring P1 [C7-C9/N1-N2] and ap henyl ring P2 [C1-C6] which are planar within 0.005 and 0.008 Å,respectively, with an interplanar angle of 77.7(1)°.Bond lengths within the molecule correspond with the average C-Cd istance for ap henyl ring [1.371(4) Å]and the angles are normal.…”