关键词: 核磁共振（NMR）, 归属,  , 2D NMR, 3, 3&prime, -二（2, 4-二氯苯基）-2, 4, 2&prime, 4&prime, -四氧杂螺[5.5]十一烷

Abstract:

The molecular structures of pentaerythritol diacetals with chiral axes were -elucidated- by 1D and 2D NMR techniques, including ¹H NMR, ¹³C NMR, DEPT, ¹H-¹H COSY, HSQC and HMBC. The chemical environment of the eight hydrogen atoms in the four methylenes were analyzed. The ¹H and ¹³C chemical shifts of 3, 3′-bis (2, 4-dichlorophenyl)-2, 4, 2′, 4′-tetraoxaspiro\[5.5\] undecane were assigned. The results should provide a basis for elucidating molecular structures of other pentaerythritol diacetals and diketals.

Key words: NMR, assignment, 2D NMR, 3, 3′-bis（2, 4-dichlorophenyl)-2, 4, 2′, 4′-tetraoxaspiro[5.5] undecane