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organic compounds
The monohydrate chloride and bromide salts of theophylline are mutually isostructural, with the cations and anions lying on crystallographic mirror planes (Z' = 
). The BF4 salt structure is based on planar hydrogen-bonded theopylline cation dimers, with the anions interacting with the dimers in a pendant fashion. The anhydrous chloride salt structure has Z' = 2 and forms one-dimensional chains of cations and anions propagating parallel to the crystallographic c direction.
). The BF4 salt structure is based on planar hydrogen-bonded theopylline cation dimers, with the anions interacting with the dimers in a pendant fashion. The anhydrous chloride salt structure has Z' = 2 and forms one-dimensional chains of cations and anions propagating parallel to the crystallographic c direction.research papers
Three soft scorpionate coordination complexes of alkali metals are presented together with an overview of the structural preferences of alkali metal soft scorpionate complexes. This analysis suggests that these thione-based ligands will continue to be a rich source of interesting alkali metal motifs worthy of isolation and characterization.
research papers
Eight crystal structures of protonated forms of the sulfa drug sulfadiazine are presented. Sulfonate-containing anions support a different tautomeric form of the sulfadiazine cation than that supported by other anions.
