NMR study of Îµ-caprolactam in various solvents. Graphical determination of monomer shift, dimer shift and dimerization constant from the dilution shift data | Zendy

JennShing Chen | Zendy

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NMR study of Îµ-caprolactam in various solvents. Graphical determination of monomer shift, dimer shift and dimerization constant from the dilution shift data

Author(s) -

JennShing Chen

Publication year - 1994

Publication title -

journal of the chemical society faraday transactions

Language(s) - English

Resource type - Journals

eISSN - 1364-5455

pISSN - 0956-5000

DOI - 10.1039/ft9949000717

Subject(s) - dimer , chemistry , dilution , caprolactam , enthalpy , monomer , chloroform , acetonitrile , extrapolation , acetone , analytical chemistry (journal) , thermodynamics , organic chemistry , polymer , physics , mathematical analysis , mathematics

A graphical method for the simultaneous determination of the monomer shift, dimer shift and dimerization constant of a self-association system from the dilution NMR shift data is proposed. This method avoids the conventional extrapolation to infinite dilution to obtain the monomer shift. Three self-association systems: Iµ-caprolactam in [2H1]chloroform, [2H6]acetone and [2H3]acetonitrile were studied at various temperatures. The enthalpy and entropy of dimerization were also determined from van't Hoff plots.

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