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本文运用了王德华等提出的分子完全不对称旋转和甲基内旋转的新理论模型(WPZ)。该理论模型考虑了甲基内旋转受阻的情况,认为甲基在分子中的位置不同,受位阻不同。设位阻因子为S~2(O≤S~2≤1)。 测定了人参皂甙Rb_3和鹅去氧胆酸CDCA一维(13)~C、1~H谱,二维C,H-COSY、H,H-COSY谱,对复杂的1~H谱进行了归属,通过分子结构及质子间偶合信息给出了一套
In this paper, a new theoretical model (WPZ) of completely asymmetric rotation of molecules and rotation of methyl groups proposed by Wang Dehua et al. The theoretical model considers the case where the rotation of the methyl group is blocked. It is assumed that the position of the methyl group in the molecule is different and the steric hindrance is different. Set the resistance factor for the S ~ 2 (O ≤ S ~ 2 ≤ 1). Determination of the ginsenoside Rb_3 and chenodeoxycholic acid CDCA one-dimensional (13) ~ C, 1 ~ H spectrum, two-dimensional C, H-COZY, H, , Through the molecular structure and the coupling information between protons is given a set