Supersonic jet studies of alkyl-substituted pyrazines and pyridines. Minimum-energy conformations and torsional motion
作者:Jeffrey I. Seeman、John B. Paine、Henry V. Secor、Hoong Sun Im、E. R. Bernstein
DOI:10.1021/ja00039a044
日期:1992.6
Conformational perferences for methyl-, ethyl-, propyl-, and isopropyl-substituted pyrazines and pyridines are determined by mass resolved excitation spectroscopy (MRES) and MOPAC 5/PM3 semiempirical calculations. The results of these studies suggest that the conformational behavior of alkyl-substituted pyrazines and pyridines is different from that of alkyl-susbtituted benzenes. Based on the experimental