摘要
本文报道37个含氟膦、胂羰基的叶立德衍生物的电子轰击(EI)和8个含氟胂羰基的叶立德的甲烷化学电离(CI)正、负离子质谱.研究其断裂规律,氧和氟原子重排以及不同取代基对一些特征离子强度的影响.
The studies on the electron impact(EI)positive ion mass spectra of thirty seven fluorinated phosphonium and arsonium ylides,and the positive and negative ion chemical ionization(CI)mass spectra of eight fluorinated arsonium ylides,using methane as the reagent gas were reported.Fragmentation patterns have been discussed.The cleavage mechanism of EI mass spectra of fluorinated arsonium ylides is similar to that of fluorinated phosphonium ones.In positive ion CI mass spectra of fluorinated arsonium ylides,ions[M+H]^(+),[(C_(6)H_(5))_(3)As+H]^(+),(C_(6)H_(5))_(2)As^(+),[M-R^(1)]+and[M-R^(2)]^(+)are formed,peaks such as[(C_(6)H_(5))_(3)AsO+H]^(+)and(C_(6)H_(5))_(3)As^(+)F have been observed,indicating the migration of oxygen and fluorine from carbon to arsonic.The negative ion CI mass spectra of fluorinated arsonium ylides are characterised by base peaks corresponding to loss of phenyl radical.
出处
《化学学报》
SCIE
CAS
1988年第2期137-142,共6页
Acta Chimica Sinica
