Mass spectrometry of nitroazoles: 4— ortho  effects: The loss of CHO˙ and CH 2 O from methyl substituted nitrodiazoles | Zendy

Luijten W. C. M. M. | Zendy; van Thuijl J. | Zendy

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Mass spectrometry of nitroazoles: 4— ortho effects: The loss of CHO˙ and CH 2 O from methyl substituted nitrodiazoles

Author(s) -

Luijten W. C. M. M.,

van Thuijl J.

Publication year - 1982

Publication title -

organic mass spectrometry

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.475

H-Index - 121

eISSN - 1096-9888

pISSN - 0030-493X

DOI - 10.1002/oms.1210170703

Subject(s) - deuterium , fragmentation (computing) , chemistry , labelling , mass spectrometry , nitro , methyl group , medicinal chemistry , ring (chemistry) , kinetic isotope effect , hydrogen , organic chemistry , chromatography , group (periodic table) , biochemistry , physics , alkyl , quantum mechanics , computer science , operating system

The interaction between methyl and nitro groups in some methyl substituted nitropyrazoles and ‐imidazoles causes the expulsion of CHO ˙ and CH 2 O. This may occur when the two substituents are at adjacent positions in the ring. Labelling with deuterium and 13 C shows that the loss of CHO ˙ and CH 2 O originates exclusively from the substituents. The isotope effects observed in partially deuterated 3(5)‐methyl‐4‐nitropyrazole are consistent with a hydrogen transfer prior to fragmentation.

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