title: Solvation of Cr3+ cation in water-acetonitrile mixture studied by IR spectroscopy: molecular penetration into the solvation shells.
abstract: Infrared spectra of mixtures of water and deuteroacetonitrile containing the Cr3+ cation have been studied as a function of concentration, time and temperature. The CN stretching vibration of CD3CN molecules has been used as a probe of the structural environments. The CN band in the spectra of the solutions is a superposition of four subbands, which may be attributed to CD3CN bound in the first, second, and third solvation shells of the cation and to non-bound CD3CN. The character of changes of the integral intensities of the subbands with time for various H2O:Cr3+ molar ratios are explained by suggesting mechanisms of molecular replacement within the solvation shells of Cr3+.
authors.affiliation: Faculty of Chemistry, Jagiellonian University, Ingardena, Poland.
authors.forename: D
authors.initials: D
authors.lastname: Jamróz
authors.forename: M
authors.initials: M
authors.lastname: Wójcik
authors.forename: J
authors.initials: J
authors.lastname: Lindgren
mesh_terms: D000097:Acetonitriles / Q000737:chemistry; D002412:Cations / Q000737:chemistry; D002857:Chromium / Q000737:chemistry*; D007700:Kinetics; D013055:Spectrophotometry, Infrared / Q000379:methods*; D014867:Water / Q000737:chemistry
chemical_list: D000097:Acetonitriles; D002412:Cations; D014867:Water; D002857:Chromium