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Studies in the relationship between molecular structure and chromatographic behaviour : XIX. An investigation of the validity of the additivity principle as applied to the gas chromatographic behaviour of alkylphenols

✍ Scribed by L.S. Bark; K.F. Clarke

Publisher
Elsevier Science
Year
1970
Tongue
English
Weight
1008 KB
Volume
48
Category
Article
ISSN
1873-3778

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✦ Synopsis

The additivity concept, inherent in the equations of MARTIN and KOVATS, is examined for some series of mono-substituted alkylphenols, chromatographed under a 'series of rigorously controlled conditions. It is concluded that for a chain length of up to four carbon atoms, the retention index changes by less than IOO units for each methylene, group added, since the dominant factor controlling the chromatographic behaviour is the'phenolic hydroxyl group. For a chain'length larger than four carbon atoms, further substitution is sufficiently far removed from the hydroxyl group that the side chain behaves as an alkane, and the value for d1 (terminal -CM,) approximates closely to IOO units of retention index.

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