Thermodynamic, transport, and spectroscopic studies for mixtures of isomeric butanediol and N-methyl-2-pyrrolidinone |
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Authors: | SK Mehta Ganga Ram Rajat Chauhan KK Bhasin |
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Institution: | Department of Chemistry and Centre of Advanced Studies in Chemistry, Panjab University, Chandigarh 160 014, India |
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Abstract: | The thermodynamic parameters viz. excess molar volume VE and speed of sound u, transport parameter viscosity η, and spectroscopic parameters viz. IR, 1H, 13C NMR have been measured for the mixtures of isomeric butanediol (1,2-, 1,3-, 1,4-, and 2,3-butanediol) and N-methyl-2-pyrrolidinone over the whole composition range at 308.15 K. The partial molar quantities , isentropic compressibility , viscosity deviation Δη, deviation in Gibbs free energies of activation for viscous flow g(x), and excess NMR chemical shift δE have been estimated and analyzed. Results show that the interaction between unlike molecules takes place through hydroxyl groups of isomeric butanediol and CO group of N-methyl-2-pyrrolidinone. Excellent agreement between thermodynamic and spectroscopic measurements is observed. |
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Keywords: | Thermodynamic characterization Spectroscopic measurements Isomeric butanediol N-methyl-2-pyrrolidinone |
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