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  • Title: 7-Amino-5-methyl-2-phenyl-6-(phenyldiazenyl)pyrazolo[1,5-a]pyrimidine crystallizes with Z' = 2: pseudosymmetry and the formation of complex sheets built from N-H...N and C-H...pi(arene) hydrogen bonds.
    Author: Portilla J, Estupiñan D, Cobo J, Glidewell C.
    Journal: Acta Crystallogr C; 2010 Mar; 66(Pt 3):o133-6. PubMed ID: 20203410.
    Abstract:
    The title compound, C(19)H(16)N(6), crystallizes with Z' = 2 in the space group P2(1)/n. The two molecules in the selected asymmetric unit are approximate mirror images of one another; most corresponding pairs of atoms are related by an approximate half-cell translation along [100]. Each molecule contains an intramolecular N-H...N hydrogen bond and the molecules are linked into complex sheets by a combination of two intermolecular N-H...N and four C-H...pi(arene) hydrogen bonds. Comparisons are made with some other 7-aminopyrazolo[1,5-a]pyrimidines.
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