Temperature dependence of the Kovats retention indices for alkyl 1, 3-diketones on a DB-5 capillary column | Zendy

Dušan Mijin | Zendy; Dušan Antonović | Zendy

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Temperature dependence of the Kovats retention indices for alkyl 1, 3-diketones on a DB-5 capillary column

Author(s) -

Dušan Mijin,

Dušan Antonović

Publication year - 2004

Publication title -

journal of the serbian chemical society

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.227

H-Index - 45

eISSN - 1820-7421

pISSN - 0352-5139

DOI - 10.2298/jsc0410759m

Subject(s) - chemistry , kovats retention index , alkyl , boiling point , enthalpy , methylene , chromatography , thermodynamics , gas chromatography , organic chemistry , physics

A series of alkyl 1,3-diketones were used to study the temperature dependence of the Kovats retention indices in the temperature range 130-190 °C (403-463 K). The temperature dependence is described by the empirical equation / = B + B/T + ClnT. On the basis of this equation, the activation enthalpy, ΔH ≠ , and the chemical potential of the partitioning of one methylene group between the two phases of the chromatographic system, Δμ p ( C H 2 ) , were calculated. Also, the Kovats retention indices - boiling point correlations (linear and reciprocal) for alkyl 1,3-diketones were studied and Δμ p ( C H 2 ) was calculated.

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