【摘要】 本文报道了应用镧系位移试剂研究两个孕甾二烯酮异构体（1和2）的17（20）位双键的构型,以Eu（dpm）₃为试剂,对假接触位移方程θ_i=K·（3cos²θ_i-1）/r_i³进行回归分析。对1用结构E时,求得R=0.0144,对2用结构Z时,R=0.107。根据回归线分离了OH及C=0分别对C₄-H的贡献之后,求得Eu（dpm）₃对OH及C=O的络合比大致为10:1。更多还原

【Abstract】 LSR study of the configuration of 17 （20） double bond of two pregnadienone isomers is reported. Eu（dpm）₃ was used as a shift reagent and a small computer performed the regression analysis for equation△_i=K（（3cos²θ_i-1）/r_i³）As a result, we obtained R=0.0144 for sample 1 with E configuration, R=0.107 for sample 2 with Z configuration. On the assumption of separation of the contributions from OH and C=O groups to the ⊿ of 4-H, the ratios of coordination of the Eu chelate onto these two groups were calculated to be about 10:1.更多还原