title: Theoretical characterization of gas-liquid chromatographic stationary phases with quantum chemical descriptors.
abstract: Quantitative structure-property relationship (QSPR) solvent model has been developed for the McReynolds constants (prototypical solutes) on 36 gas-liquid chromatographic stationary phases. PM6 semiempirical quantum chemical calculations combined with conductor-like screening model (COSMO) has been utilized. From 276 descriptors considered, forward stepwise variable selection, followed by best subset selection, yielded linear regression models containing six purely quantum chemical and two hybrid, topologically based descriptors. Internal (leave-one-out and bootstrap) as well as external validation methods confirmed the predictive power of these structure-driven models across all 10 McReynolds constants, with 40 Kováts-index units overall root-mean-square prediction error estimate.
authors.affiliation: Department of Physical Chemistry, University of Szeged, Szeged, Hungary.
authors.forename: Eufrozina A
authors.initials: EA
authors.lastname: Hoffmann
authors.forename: Zoltan A
authors.initials: ZA
authors.lastname: Fekete
authors.forename: Robert
authors.initials: R
authors.lastname: Rajkó
authors.forename: István
authors.initials: I
authors.lastname: Pálinkó
authors.forename: Tamás
authors.initials: T
authors.lastname: Körtvélyesi
mesh_terms: D003198:Computer Simulation; D008401:Gas Chromatography-Mass Spectrometry / Q000295:instrumentation*; D016014:Linear Models; D008956:Models, Chemical; D016011:Normal Distribution; D009930:Organic Chemicals / Q000737:chemistry; D021281:Quantitative Structure-Activity Relationship; D015203:Reproducibility of Results
chemical_list: D009930:Organic Chemicals