title: 3-(1H-pyrrol-2-yl)-1H-pyrazole forms an unusual hydrogen-bonded two-dimensional (3,4)-connected net.
abstract: The title compound, C7H7N3, is the first crystallographically characterized 1H-pyrrolyl-1H-pyrazole derivative and contains two unique molecules in its asymmetric unit (Z' = 2). These molecules associate into centrosymmetric tetramers through N-H...N hydrogen bonding, including a cyclic dimerization of one of the two unique pyrazole rings. These tetramers are linked further by two weaker N-H...pi contacts to give a novel two-dimensional (3,4)-connected net with a (3(2).8)(2)(3.8(2))(2) topology.
authors.affiliation: School of Chemistry, University of Leeds, Woodhouse Lane, Leeds LS2 9JT, England.
authors.forename: Katie E R
authors.initials: KE
authors.lastname: Marriott
authors.forename: Colin A
authors.initials: CA
authors.lastname: Kilner
authors.forename: Malcolm A
authors.initials: MA
authors.lastname: Halcrow