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The isobutane chemical ionization mass spectra of 2‐methyl substituted 1,3‐cycloalkanediol diacetates and dimethyl ethers
Author(s) -
Dhaenens L.,
Van De Sande C. C.,
Vangaever F.
Publication year - 1979
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.1210140308
Subject(s) - isobutane , chemistry , cyclopentane , mass spectrum , steric effects , chemical ionization , protonation , ionization , ring (chemistry) , diol , organic chemistry , photochemistry , medicinal chemistry , catalysis , ion
The isobutane chemical ionization mass spectra of 2‐methyl‐1,3‐cyclopentane and 1,3‐cyclohexanediol diacetates and dimethyl ethers reveal that the proton bridge in the protonated cis diol derivatives is sensitive to conformational and steric effects. The latter dominate in the case of the methyl ethers on account of the smaller ring created by the proton bridge in the ethers in comparison with the diacetates. Finally, the spectra of the trideuterocetates and trideuteromethyl ethers reveal the occurrence of protolysis in the ionizing plasma.