organic compounds
In the title compound, C4H8N3O+·NO3-, creatininium cations and nitrate anions are linked to each other through strong hydrogen bonds, formed by all H atoms covalently bonded to the N atoms. Short contacts are also observed between the anions. This complex three-dimensional network of hydrogen bonds ensures the cohesion of the ionic structure.
metal-organic compounds
In the structure of the mononuclear title complex, [Cu(C21H16NO2S)2], the CuII atom, which lies on an inversion centre, displays approximately square-planar coordination geometry. The bidentate ligands coordinate through their phenolate O and imine N atoms in a mutually trans orientation. The structure is stabilized by a three-dimensional network of C—HO hydrogen bonds.
organic compounds
The crystal structure of DL-2-ammonium-4-methylvaleric acid nitrate (C6H14NO2+·NO3-, DL-leucinium nitrate) can be described by considering two types of layers parallel to the bc plane: hydrophilic layers including the head of the leucinium residue (ammonium and carboxylic groups) with the nitrate anion, and hydrophobic layers including the tail of the leucinium residue.
organic compounds
In the title compound, C4H6N3O+·C2HO4−·H2O, the cytosine molecule is protonated and oxalic acid is in the monoionized state. The structure is stabilized by O—HO and N—HO hydrogen bonds, and van der Waals interactions. The water molecules are also found to mediate interactions between oxalate anions and cytosinium cations.