The fragmentation of some alkyl thio-phosphate esters by electron-impact†
The fragmentation of some alkyl thio-phosphate esters by electron-impact†
复制标题
一些烷基硫代磷酸酯通过电子撞击而碎裂†
DOI：
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发表时间：
1973
期刊：
影响因子：
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通讯作者：
E. Santoro
中科院分区：
文献类型：
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作者：
E. Santoro
The mass spectra of the following compounds have been studied:
and the fragmentation pathways established with the aid of accurate mass measurements, metastable transition and appearance potential determination. The mass spectra show that the sulphur-containing compounds (II to IV) give a stronger molecular ion that that of compound I. A further significant difference is the low intensity, in the mass spectra of II to IV, of the fragments relative to the processes that occur in I, probably because the electron removed upon ionisation belongs to the sulpher atom in compounds II to IV and to the oxygen in compound I. The isomeric compounds, (III and IV) show quite different mass spectra, The radicals containing only Phosphorus and oxygen have an ionisation potential close to 9 eV and the presence of sulphur considerably lowes this value. The measured ionisation potentials of compounds I to IV are respectively, 10·70, 9·55, 9·20 and 9·00eV. The heats of formation of compounds II and III have been estimated as −176 and −118 Kcal mole−1, respectively.
