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  • Title: Isolated molecules in 2-ethylsulfanyl-7-methyl-4-(4-methylphenyl)pyrazolo[1,5-a][1,3,5]triazine and hydrogen-bonded sheets of R2/2(10), R2/2(16), R4/4(22) and R4/4(24) rings in 2-ethylsulfanyl-7-methyl-4-(4-nitrophenyl)pyrazolo[1,5-a][1,3,5]triazine.
    Author: Insuasty H, Estrada M, Cobo J, Low JN, Glidewell C.
    Journal: Acta Crystallogr C; 2006 Mar; 62(Pt 3):o122-4. PubMed ID: 16518045.
    Abstract:
    In each of 2-ethylsulfanyl-7-methyl-4-(4-methylphenyl)pyrazolo[1,5-a][1,3,5]triazine, C15H16N4S, (I), and 2-ethylsulfanyl-7-methyl-4-(4-nitrophenyl)pyrazolo[1,5-a][1,3,5]triazine, C14H13N5O2S, (II), there is significant bond fixation in the heterocyclic component. While there are no direction-specific intermolecular interactions in the structure of (I), the molecules of (II) are linked by a combination of C-H...O and C-H...S hydrogen bonds into sheets containing four types of ring, all centrosymmetric.
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