inorganic compounds
NdI3·9H2O contains Nd3+ ions bonded to water molecules in a tricapped trigonal prismatic coordination geometry (coordination number 9).
inorganic compounds
The room temperature single-crystal X-ray structure determination of the title compound, PrI3·9H2O, better represented as [Pr(OH2)9]I3, shows unequivocally that it belongs to the structure type preferably adopted by hydrates of the lighter rare earth iodides (La-Ho). The praseodymium cation is coordinated by nine water molecules in the form of a tricapped trigonal prism with the metal atom situated on a site of crystallographic symmetry mm2.
organic compounds
The asymmetric unit of the title compound, C7H11N2+·Br−·H2O, consists of one crystallographically independent 1-ethyl-2,3-dimethylimidazolidinium cation, one bromide anion and one water molecule, all of them located in general positions. In the crystal structure, the bromide anions and the water molecules are connected via O—HBr hydrogen bonding to form dimers which are located on centres of inversion. In addition, the cations are connected to the water molecules via weak C—HO hydrogen bonding.
organic compounds
The asymmetric unit of the title compound, C8H18N+·I-, contains one crystallographically independent N-methyl-N-propylpyrrolidinium cation and one iodide anion, both located in general positions. No significant hydrogen bonding between the carbon-bound H atoms and the halide anion is observed.