title: Crystal structure of 1-ethyl-pyrazolo[3,4-d]pyrimidine-4(5H)-thione.
abstract: In the title compound, C7H8N4S, the methyl C atom is displaced by 1.232 (7) Å from the mean plane of the pyrazolo-[3,4-d]pyrimidine ring system (r.m.s. deviation = 0.007 Å). The N-N-C-Cm (m = meth-yl) torsion angle is -60.3 (6)°. In the crystal, mol-ecules are linked by N-H⋯S hydrogen bonds, generating [010] chains, which are reinforced by C-H⋯N inter-actions. The chains are cross-linked by weak C-H⋯S hydrogen bonds, generating (001) sheets.
authors.affiliation: Laboratoire de Chimie Organique Hétérocyclique URAC 21, Pôle de Compétence Pharmacochimie, Av. Ibn Battouta, BP 1014, Faculté des Sciences, Université Mohammed V-Agdal, Rabat, Morocco.
authors.forename: Mohammed
authors.initials: M
authors.lastname: El Fal
authors.affiliation: Laboratoire National de Contrôle des Médicaments, D M P, Ministère de la Santé, Madinat Al Irnane, BP 6206, Rabat, Morocco.
authors.forename: Youssef
authors.initials: Y
authors.lastname: Ramli
authors.affiliation: Laboratoire de Chimie Organique Hétérocyclique URAC 21, Pôle de Compétence Pharmacochimie, Av. Ibn Battouta, BP 1014, Faculté des Sciences, Université Mohammed V-Agdal, Rabat, Morocco.
authors.forename: El Mokhtar
authors.initials: el M
authors.lastname: Essassi
authors.affiliation: Laboratoire de Chimie du Solide Appliquée, Faculté des Sciences, Université Mohammed V-Agdal, Avenue Ibn Battouta, BP 1014, Rabat, Morocco.
authors.forename: Mohamed
authors.initials: M
authors.lastname: Saadi
authors.affiliation: Laboratoire de Chimie du Solide Appliquée, Faculté des Sciences, Université Mohammed V-Agdal, Avenue Ibn Battouta, BP 1014, Rabat, Morocco.
authors.forename: Lahcen
authors.initials: L
authors.lastname: El Ammari
keywords: biological activity; crystal structure; hydrogen bonding; pyrazolo­[3,4-d]pyrimidine