Unified retention index of hydrocarbons separated on dimethylsilicone OV-101

Boneva, S.; Dimov, N.

doi:10.1007/bf02313682

Cited by 17 publications

(6 citation statements)

References 6 publications

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“…In stark contrast, the retention times of the alkanes on Chirasil-gDex are much shorter and the elution order differs markedly from that of Chirasil-b-Dex. The elution order of the alkanes on Chirasil-g-Dex is in full agreement with their retention-indices I on poly(dimethylsiloxane) 34 and with their boiling points ( Table 2). It can therefore be concluded that the alkanes do not undergo a strong selective interaction with the permethylated g-cyclodextrin.…”

Section: Resultssupporting

confidence: 58%

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Gas chromatographic enantioseparation of unfunctionalized chiral alkanes: A challenge in separation science (overview, state of the art, and perspectives)

et al. 2008

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The chromatographic enantioseparation of small unfunctionalized chiral alkanes C*HR(1)R(2)R(3) (R = alkyl) represents a challenge in separation science. Because of the lack of any functional groups, enantiorecognition in the presence of a chiral selector is solely based upon weak enantioselective Van der Waals forces. Racemic alkanes containing seven and eight carbon atoms, i.e. 3-methylhexane (C7), 2,3-dimethylpentane (C7), 3-methylheptane (C8), 3,4-dimethylhexane (C8), 2,4-dimethylhexane (C8), 2,3-dimethylhexane (C8), and 2,2,3-trimethylpentane (C8) have been gas chromatographically enantioseparated on different modified cyclodextrins. The substitution pattern and cavity size of the cyclodextrin selectors have a pronounced effect on the degree of enantiorecognition observed. Thermodynamic parameters of enantiorecognition between four chiral alkanes and octakis(6-O-methyl-2,3-di-O-pentyl)-gamma-cyclodextrin (Lipodex G) have been determined. The possible role of molecular inclusion is indicated by the complete loss of enantioselectivity when the cyclodextrins are replaced by the corresponding linear dextrins ("acyclodextrins"). The enantioseparations of all seven chiral C7-C8 alkanes, six of them simultaneously, has been achieved on mixed binary selector systems whereby two different modified cyclodextrins are present in one gas chromatographic column. The smallest chiral (nonisotopically labeled) allene, i.e., 2,3-pentadiene, has been resolved gas chromatographically on a cyclodextrin selector.

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Section: Resultssupporting

confidence: 58%

“…6, top). The strong and selective molecular interaction of the alkanes with Chirasil-b-Dex is clearly evident from the pronounced deviation of the observed retention times from the retention indices I on the poly(dimethylsiloxane) matrix 34 to which the selector is chemically linked (Table 2).…”

Section: Resultsmentioning

confidence: 93%

Gas chromatographic enantioseparation of unfunctionalized chiral alkanes: A challenge in separation science (overview, state of the art, and perspectives)

et al. 2008

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“…The retention indices were measured on different stationary phases at different temperatures squalane (25 ~ 50 ~ 70 ~ and 80 ~ [2,8,12], 1-octadecene (25 ~ [2], Apiezon-L (130 ~ [2], OV-1 (60 ~ [6], and DB-1 (40 ~ [13].…”

Section: Data Setmentioning

confidence: 99%

Use of a semi-empirical topological method to predict the chromatographic retention of branched alkenes

et al. 2002

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Gas ch romatog raphy Quantitative structure-retention relationships QSRR Semi-empirical topological method Topological indices Branched alkenes SummaryThe new semi-empirical topological index (lET) previously developed by Heinzen, Soares, and Yunes has been extended to branched alkenes. The main advantage of this method was excellent predictive power and high statistical quality using one topological descriptor only, in comparison with those achieved with a variety of descriptors by multivariate regression techniques and recognition patterns. Another advantage is that this molecular descriptor is related to structural features of the molecule, which enables the cis and trans structures of branched alkenes to be distinguished and highlights the propyl effect -a special steric effect resulting from branching at carbon atoms/? to the dou ble bond. The stabihty and validity of the model generated on squalane (80 ~ was tested by the cross-validation (r2cv = 0.997) technique.

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“…[9] were converted to specific retention volumes V : using the absolute retention data reported in ref.…”

Section: Resultsmentioning

confidence: 99%

“…The smallest linear least-squares regression correlation coefficient for the latter values when considered either in terms of log V i vs. carbon number or as inverse temperature (van't Hoff plots) is 0.999997, which also lends further credence to the data of ref. [9].…”

Section: Solutementioning

confidence: 95%

Specific retention volumes and retention indices of selected olefin solutes with OV‐101 poly (dimethylsiloxane) stationary phase

Laub

1987

J. High Resol. Chromatogr.

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Unified retention index of hydrocarbons separated on dimethylsilicone OV-101

Cited by 17 publications

References 6 publications

Gas chromatographic enantioseparation of unfunctionalized chiral alkanes: A challenge in separation science (overview, state of the art, and perspectives)

Gas chromatographic enantioseparation of unfunctionalized chiral alkanes: A challenge in separation science (overview, state of the art, and perspectives)

Use of a semi-empirical topological method to predict the chromatographic retention of branched alkenes

Specific retention volumes and retention indices of selected olefin solutes with OV‐101 poly (dimethylsiloxane) stationary phase

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