Solvation of Al3+, Fe3+, and Cr3+ Cations in Water−Acetonitrile Mixtures Studied by IR Spectroscopy

摘要: Mixtures of water and acetonitrile with trivalent cationsAl3+, Fe3+, Cr3+in the full concentration range have been studied by infrared spectroscopy. CN stretching vibrations CD3CN molecules used as probes structural environments. The band in each case is a superposition four subbands, which may be attributed to bonded first, second, third coordination shells cation free acetonitrile. changes integral intensities subbands H2O:Me3+ molar ratio show that tends dislodge from spheres cation. composition first sphere determined only ratio, whereas second depends on both solvents.