Reaction of acetylenic gama-glycols. XXXVII. Dehydroxylation and decarbonylation processes in MS-spectra of sym. aromatic diols without and with halogen substituents in para position of phenyl

• Autorzy: Jasiobędzki W. , Olejnik M.
• Języki publikacji: EN

Abstrakty

EN

The electron ionization-induced fragmentation patterns of five diols (with H, F, Cl, Br, I substituents in para positions of phenyls) have been studied, especially the title processes. Alternation of dehydroxylation and decarbonylation processes has been found. The elimination of CO causes a rearrangement of the neighbouring aryl and H. The formation of cumulene ions is possible from M(+*)-H(2)O and M(+*)-H(2)O, X* ions. It has been shown that the acetylenic bond has the ability to hold Ph*", PhX* (X=halogen), CeH4, H. The halogen (type), in comparison with the unsubstituted diol, introduces quantitative and not qualitative changes. With a decrease in the induction effect of the halogen, the relative intensity (%) of fragment ions increases, especially of those having small m/z values.

Słowa kluczowe

EN

metastable ions; dehydroxylation; decarbonylation; acetylenic bond; phenyl; hydrogen

PL

jony metastabilne; dehydroksylacja; dekarbonylacja; wiązanie acetylenowe; fenyl; wodór

• Wydawca: Centrum Upowszechniania Nauki PAN
• Czasopismo: Bulletin of the Polish Academy of Sciences. Chemistry
• Rocznik: 2002
• Tom: Vol. 50, No. 3
• Strony: 323--334
• Opis fizyczny: Bibliogr. 10 poz.

Twórcy

autor

Jasiobędzki W.

autor

Olejnik M.

• Spectrscopic Research Group (Formerly Instrumental Analysis Laboratory), Laboratory of Technological Processes, Faculty of Chemistry, Warsaw University of Technology, Noakowskiego 3, 00-664 Warszawa (Zespół Naukowy Badań Spektralnych [Dawniej: Międzyins