Mf. Simeonov et al., CONFORMATIONAL COMPLEXITY IN 7-MEMBERED CYCLIC TRIAZEPINONE OPEN HYDRAZONES .2. MOLECULAR MODELING AND X-RAY STUDY, Journal of organic chemistry, 62(15), 1997, pp. 5089-5095
The thermodynamic parameters obtained from NMR experiments are compare
d with the results of theoretical (molecular mechanics MMX and semiemp
irical AM1, PM3, and MNDO MO) calculations and of X-ray measurements t
o acquire an additional insight into the dynamic processes of these se
ven-membered benzoheterocycles.