Formation of [M − H]+ ions in electron impact mass spectra of nitrosocarbonyl compounds α- and γ-nitrosocarbonyl compounds
摘要:
AbstractThe presence of the [M + H]+ ions and the absence of the monomer molecular ions M+· in the mass spectra of some tertiary α‐ and γ‐nitrosocarbonyl compounds is reported. This effect is caused by the rearrangement of the mobile hydrogen in the α‐carbonyl position in the fragmentation pattern of the dimer molecular ions 2M+·.
A convenient synthesis of deuterium labeled tertiary aliphatic nitro ketones and nitriles – starting materials for preparation of deuterated cyclic nitrones, isomeric hydroxylamines, and corresponding C-nitroso compounds
作者:Karol Grela、Leszek Konopski
DOI:10.1016/j.tet.2010.03.022
日期:2010.5
selected positions had been synthesized. The deuterated nitro compounds served as a startingmaterial for the corresponding deuterium labeled nitrones or hydroxylamines (reducing with aluminum amalgam). Further oxidation of the last two groups of compounds with sodium periodate or m-CPBA afforded the relevant deuterated tertiary C-nitroso compounds.
Formation of [M − H]+ ions in electron impact mass spectra of nitrosocarbonyl compounds α- and γ-nitrosocarbonyl compounds
作者:Leszek Konopski
DOI:10.1002/oms.1210250405
日期:1990.4
AbstractThe presence of the [M + H]+ ions and the absence of the monomer molecular ions M+· in the mass spectra of some tertiary α‐ and γ‐nitrosocarbonyl compounds is reported. This effect is caused by the rearrangement of the mobile hydrogen in the α‐carbonyl position in the fragmentation pattern of the dimer molecular ions 2M+·.