Synthesis and Spectroscopic Studies of Aikali Pentafluoroaquochromates (III)

摘要

Chromium(VI) oxide undergoes a very facile reduction with formaldehyde solution in the presence of 40 hydrofluoric acid and AF (A = NH4+, Na+, K+or Rb+) giving green, crystalline A2CrF5(H2O)- in very high yields. The structural assessment of the compounds was made from magnetic moments, infrared and electronic spectroscopic data. The electronic spectra of A2CrF5(H2O)- in the solid state and in solution suggest no apparent change in its structure.