Crystallographic Data. 86. Tris(ethylenediamine)cobalt(III) Phosphates

Precipitation of Pyrophosphate and Triphosphate with Tris(ethylenediamine)cobalt(III) Chloride and Hexamminecobalt(III) Chloride

“…The pyrophosphate precipitate taken from the filter contained 4.3 to 4.5% water and after drying at room temperature and 47% humidity contained 4.02% water, indicating a monohydrate (theory, 4.17%). The x-ray patterns of the air-dried and anhydrous precipitates were different (7).…”

“…On the universal stage the needlelike crystals proved to be identical with the tabular crystals. Optical properties and x-ray powder diffraction data useful for identifying these and the pyrophosphate crystals have been published (7). pH Table III Amperometric titrations of triphosphate with the reagent (Table II) showed that the precipitate contained three hexamminecobalt(III) ions per two triphosphate ions.…”

“…An analysis of variance as described by Snedecor (7) was then applied to the data obtained by the Latin square arrangement so that the effect of methods (polarographic vs. chemical and Wheeler iodide vs. stannous chloride), aliquots, times, interaction, and interaction within the three individual methods could be evaluated. In this experiment the three undiluted aliquots of each original material were transferred to separate containers and each of these aliquots were analyzed by the three methods on the three different days.…”