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Keywords:

  • bistable jump model;
  • 13C spin-lattice relaxation time;
  • prolyl peptides;
  • pyrrolidine ring conformations

A method was developed in the framework of a bistable jump model to obtain the pyrrolidine ring conformations in proline peptides from 13C spin-lattice relaxation times. Equations are presented expressing the ring torsions in terms of the 13C spin-lattice relaxation times of the ring carbons. This method was applied to 26 pyrrolidine ring systems and acceptable conformations were obtained.