Monoclinic form I of clopidogrel hydrogen sulfate from powder diffraction data

The asymmetric unit of the title compound, C16H17ClNO2S+·HSO4 −, (I) [systematic name: (+)-(S)-5-[(2-chloro­phen­yl)(meth­oxy­carbon­yl)meth­yl]-4,5,6,7-tetra­hydro­thieno[3,2-c]pyridin-5-ium hydrogen sulfate], contains two independent cations of clopidogrel and two independent hydrogensulfate anions. The two independent cations are of similar conformation; however, this differs from that observed in ortho­rhom­bic form (II) [Bousquet et al. (2003 ▶). US Patent No. 6 504 030]. The H—N—Cchiral—H fragment shows a trans conformation in both independent cations in (I) and a gauche conformation in (II). In (I), classical inter­molecular N—H⋯O and O—H⋯O hydrogen bonds link two independent cations and two independent anions into an isolated cluster, in which two cations inter­act with one anion only via N—H⋯O hydrogen bonds. Weak inter­molecular C—H⋯O hydrogen bonds further consolidate the crystal packing

Bis{4′-[(2,3,5,6,8,9,11,12-octa­hydro-1,4,7,10,13-benzopenta­oxacyclo­penta­decin-15-yl)meth­oxy]-2,2′:6′,2′′-terpyridine}cadmium(II) bis­(hexa­fluorido­phosphate) trihydrate: a powder study

The asymmetric unit of the title compound, [Cd(C30H31N3O6)2](PF6)2·3H2O, contains one half-cation with the CdII center situated on a twofold rotational axis, one hexa­fluoridophosphate anion and two uncoordinated water mol­ecules, one of which is also situated on a twofold rotational axis. The cations are associated into columns along the a axis through π–π inter­actions between the pyridine and benzene rings, with a centroid–centroid distance of 3.72 (5) Å. Inter­molecular O—H⋯O, C—H⋯O and C—H⋯F hydrogen bonds consolidate the crystal packing

Carvedilol dihydrogen phosphate propan-2-ol solvate from powder diffraction data

In the cation of the title compound, C24H27N2O4 +·H2PO4 −·C3H8O [systematic name: 3-(9H-carbazol-4-yl­oxy)-2-hydr­oxy-N-[2-(2-methoxy­phen­oxy)eth­yl]propan-1-aminium dihydro­gen phosphate propan-2-ol solvate], the mean planes of the tricyclic carbazole system and the benzene ring form a dihedral angle of 42.00 (16)°. In the crystal structure, classical inter­molecular O—H⋯O and N—H⋯O hydrogen bonds link the cations, anions and solvent mol­ecules into layers parallel to the ac plane

Carvedilol dihydrogen phosphate hemihydrate: a powder study

In the cation of the title compound [systematic name: 3-(9H-carbazol-4-yloxy)-2-hydroxy-N-[2-(2-methoxyphenoxy)ethyl]propan-1-aminium dihydrogen phosphate hemihydrate], C24H27N2O4+·H2PO4−·0.5H2O, the mean planes of the tricyclic ring system and the benzene ring form a dihedral angle of 87.2 (2)°. In the crystal structure, the solvent water molecule is situated on a twofold rotation axis linking two cations via O—H...O and N—H...O hydrogen bonds. The anions contribute to the formation O—H...O and N—H...O hydrogen bonds between the anions and cations, which consolidate the crystal packing

4′-(2,5,8,11,14-Pentaoxabicyclo[13.4.0]nonadeca-15,17,19-trien-17-yloxy)-2,2′:6′,2′′-terpyridine: a powder study

The central pyridine ring of the 2,2′:6′,2′′-terpyridine fragment of the title compound, C29H29N3O6, forms dihedral angles of 5.2 (5), 10.1 (5) and 86.0 (6)°, respectively, with the two outer pyridine rings and the benzene ring of the benzo-15-crown-5 fragment