%0 Journal Article
%T 3-Hydroxy-2,2-bis(1H-pyrazol-1-yl)cyclopentanone
%A Victor B. Rybakov
%A Anastasia A. Utkina
%A Alexander V. Kurkin
%A Marina A. Yurovskaya
%J Acta Crystallographica Section E
%D 2012
%I International Union of Crystallography
%R 10.1107/s1600536812007659
%X The title compound, C11H12N4O2, was unexpectedly obtained in the reaction of ¦Á,¦Á¡ä-disubstituted cyclopentanone with 1,1,3,3-tetramethoxypropane in the presence of dioxane saturated with HCl. It belongs to a previously unknown class of gem-bihetaryl ketones which may be useful for screening of new substances with biological activity. In the studied structure, the cyclopentanone moiety adopts an envelope conformation, with the hydroxy-bearing C atom as the flap [deviation from basal plane = 0.643 (3)  ]. The dihedral angle between the two pyrazole rings is 80.02 (8)¡ã. In the crystal, inversion dimers are formed via a pair of O¡ªH...N hydrogen bonds.
%U http://scripts.iucr.org/cgi-bin/paper?S1600536812007659