环十二酮肟及其羧酸脂的EIMS研究

EI Mass Spectra of Cyclodecanoe Oxime and Its Derivatives

摘要: 对环十二酮肟（A）及其行生物（B1～B9）进行了EIMS裂解规律的研究，十二酮肟环开裂后主要形成CnH2n-1C＝NOH及CnH2nCNOH系列的离子，羟基转移后脱C7H14CN形成基峰．羟基氢原子被OC（O）R取代后，取代基的a位及等基裂解成为主要方式。

Abstract: Cyclododecanoe oxime (,A)and its derivatives (,B),were analysed with mass spectrometer. The base peak(HOC4H8 m/z 73) was produced by acleavage,hydroxy transferring and loss of C7H14CN. The ions of (CnH2nC=NOH)+ and (CnH2nC=NOH)+ arise from a-cleavage of cyclododecanoe oxime. After the hydrogen of hydroxy was substitued with RC(O)O,the a-cleavage of carbonyl group and the benzyl cleavage were more importance.