An MO Theoretical Studies on Conformations of Methyl and Ethyl Chanoacetates

  • Lee, Ikchoon (Department of Chemistry, College of Science, Inha University) ;
  • Kim, Jik-Tae (Department of High Polymer, College of Engineering, Dong Guk University) ;
  • Kim, Ui-Rak (Department of Chemistry Catholic Medical College)
  • Published : 1974.09.01

Abstract

The extended Huckel molecular orbital calculations have been carried out on rotamers of methyl and ethyl cyanoacetates. Results show that cis orientation of C≡N group is favored while for $CH_3$group trans orientation is favored. The major part of the stabilization energies can be accounted for by the electrostatic energies between the atoms involved.

메틸 및 에틸 시아노 아세테이트의 각종 회전체에 대하여 확장 Huckel 분자 궤도법 계산을 실시하였다. 결과로 C≡N 기는 cis 배치가 안정하고 $CH_3$기는 trans 배치가 안정함을 알았다. 또 안정화 에너지의 대부분은 정전기적인 일자간의 인력에 기인되는 것임을 밝혔다.

Keywords