Abstract
Conformation of cis-2-butenedialdioxime, a newly synthesized compound, was assigned by means of nuclearmagnetic resonance, extended Huckel molecular orbital method, and Pople's model of anisotropic effect. It was confirmed that two carbon-carbon single bonds are conrotatorily twisted from the molecular plane of six $sp^2$ orbitals of carbon-carbon double bond. The conformation of minimum energy is found to be twisted by$25^{\circ}C.$
새로 合成한 cis-2-butenedialdioxime의 立體構造를 NMR, 攫張分子軌道法(EHT) 및 非等方性效果에 대한 Pople의 model을 사용하여 그 形態를 決定하였다. 이 物質의 두개의 炭素-炭素 單一結合이 炭素-炭素 二重結合의 여섯 $sp^2$ 混成軌道가 이루는 平面에서 같은 方向으로 25˚回轉된 形態임을 알았다.