CHARACTERIZATION OF THE NEUTRAL PRODUCTS FORMED UPON THE CHARGE-REMOTE FRAGMENTATION OF FATTY-ACID IONS

被引：60

作者：

CORDERO, MM ^{[1
]}

WESDEMIOTIS, C ^{[1
]}

机构：

[1] UNIV AKRON,DEPT CHEM,AKRON,OH 44325

来源：

ANALYTICAL CHEMISTRY | 1994年 / 66卷 / 06期

关键词：

D O I：

10.1021/ac00078a017

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Collisionally activated dissociation (CAD) of the carboxylate anions, [M-H](-), or dilithiated cations, [M - H + 2Li](+), from fatty acids results in charge-remote fragmentations at the alkyl chain C-C bonds leading to structure-indicative fragment ions. The neutral molecules eliminated during these reactions are characterized in this study using neutralization-reionization mass spectrometry (NRMS). The major neutral losses detected are alkenes (or dienes, is the case of monounsaturated fatty acids), not alkanes or alkyl radicals. This is consistent with the initially proposed mechanism proceeding by a pericyclic 1,4-elimination of H-2.

引用

页码：861 / 866

页数：6

共 38 条

[1] CHARGE-REMOTE FRAGMENTATIONS - ANALYTICAL APPLICATIONS AND FUNDAMENTAL-STUDIES [J].