TY  - JOUR
A1  - Modarresi, Ali Reza
A1  - Najafi, Parisa
A1  - Rostamizadeh, Mohsen
A1  - Keykha, Hossein
A1  - Bijanzadeh, Hamid-Reza
A1  - Kleinpeter, Erich
T1  - Dynamic 1H NMR study of the barrier to rotation about the C-N bond in primary carbamates and its solvent dependence
N2  - The dynamic 1H NMR study of some primary carbamates in the solvents CDCl3 and CD3COCD3 between 183 and 298 K is reported. The free energies of activation, thus obtained (12.4 to 14.3 kcal mol-1), were attributed to the conformational isomerization about the N-C bond. These barriers to rotation show solvent dependence in contrast to the tertiary analogues and are lower in free energy by ca. 2-3 kcal mol-1.
Y1  - 2007
ER  -