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    STUDIA CHEMIA - Issue no. 2%20(Tom%20I%20 / 2010  
         
  Article:   INTERMOLECULAR INTERACTIONS OF 1- AND 2-BROMOPROPANE WITH SOLVENT MIXTURES STUDIED BY INFRARED SPECTROSCOPY.

Authors:  RODICA GRECU , VIRGINIA COMAN, ONUC COZAR.
 
       
         
  Abstract:  

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

 
         
     
         
         
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