Abstract
The title compound, (C5H7N2)2[CdI4]·H2O, contains one [CdI4]2− anion, two prontonated 4-aminopyridine molecules and one water molecule in the asymmetric unit. In the anion, the CdII atom is coordinated by four I atoms in a slightly distorted tetrahedral geometry. The [CdI4]2− anion and the water molecule are bisected by a crystallographic mirror plane perpendicular to the c-axis direction, with the CdII atom, two of the I atoms and the atoms of the water molecule located on this plane. The crystal packing is stabilized by intermolecular N—H⋯I, N—H⋯O and O—H⋯I hydrogen bonds and by π–π stacking interactions [centroid–centroid distance = 3.798 (3) Å) between pyridine rings, which build up a three-dimensional network.
Highlights
The CdII atom is coordinated by four I atoms in a slightly distorted tetrahedral geometry
The [CdI4]2 anion and the water molecule are bisected by a crystallographic mirror plane perpendicular to the c-axis direction, with the CdII atom, two of the I atoms and the atoms of the water molecule located on this plane
H atoms treated by a mixture of independent and constrained refinement max = 0.91 e Å3
Summary
R factor = 0.025; wR factor = 0.064; data-to-parameter ratio = 18.2. The title compound, (C5H7N2)2[CdI4]H2O, contains one [CdI4]2 anion, two prontonated 4-aminopyridine molecules and one water molecule in the asymmetric unit. The CdII atom is coordinated by four I atoms in a slightly distorted tetrahedral geometry. The [CdI4]2 anion and the water molecule are bisected by a crystallographic mirror plane perpendicular to the c-axis direction, with the CdII atom, two of the I atoms and the atoms of the water molecule located on this plane. The crystal packing is stabilized by intermolecular. 3.798 (3) Å) between pyridine rings, which build up a threedimensional network
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