Rezumat articol ediţie STUDIA UNIVERSITATIS BABEŞ-BOLYAI

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The parameters of a vibrational band are sensitive to the environment created by solvents. The effects of the two solvent mixtures cyclohexane/tetrahydrofuran and carbon tetrachloride/acetonitrile on the frequency and half bandwidth of ν(C-Br) band of 1- and 2-bromopropane are investigated. The first mixture can be considered “ideal” and the frequency and half bandwidth of ν(C-Br) bands varies linearly on the mole fraction of the polar solvent. In the case of carbon tetrachloride/acetonitrile mixture, a process of “preferential solvation” with the maximum effect at 2 : 1 volume ratio was evidenced.

Keywords: infrared spectroscopy, 1-bromopropane, 2-bromopropane, intermolecular interactions, solvent mixtures, preferential solvation index Z