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Synthetic Methyl- and Dimethylalkanes : Kovats Indices, [(13)C]NMR and Mass Spectra of Some Methylpentacosanes and 2,X-dimethylheptacosanes

Overview
Journal J Chem Ecol
Publisher Springer
Specialties Chemistry
Environmental Health
Date 2013 Nov 26
PMID 24272420
Citations 12
Authors
J George Pomonis
H Hakk
C L Fatland
Affiliations
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Abstract

All possible isomeric mono-methylpentacosanes as well as 2,6-, 2,8-, 2,10-, 2,12-, and 2,14-dimethylheptacosane were synthesized. The [(13)C]NMR shifts and the Kovats indices were determined, and the relationship to separation of isomeric mixtures of insect cuticular waxes are discussed. When several homologous series of hydrocarbon isomeric mixtures are to be separated, it is not practical to attempt complete gas-chromatographic separation of all possible isomers. The mass spectra of the 2,X-dimethylheptacosanes are presented and discussed.

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