Detailed Structure of One-Dimensional ${\mathrm{K}}_2$Pt${\mathrm{}\left(\mathrm{CN}\right)\mathrm{}}_4$ ${\mathrm{Cl}}_{0.33}$·3.0${\mathrm{H}}_2$O: A High-Precision Neutron-Diffraction Study

A highly precise (3427 observed reflections at 22±2°C) single-crystal neutron-diffraction study of ${\mathrm{K}}_2$Pt${\mathrm{}\left(\mathrm{CN}\right)\mathrm{}}_4$ ${\mathrm{Cl}}_{0.33}$·3.0${\mathrm{H}}_2$0, reveals that it is isostructural with the Br compound. The chemical formula above was determined by least-squares refinement of the Cl, O, and H site occupancy factors. It is demonstrated that the square, but non-planar, Pt${\mathrm{}\left(\mathrm{CN}\right)\mathrm{}}_4^{-2\mathrm{}}$ groups are both canted toward the ${\mathrm{K}}^{+}$ ion, and also that two disordered ${\mathrm{Cl}}^{-}$ sites are observed, as is the case in the Br compound.