Comparison of Gas-Chromatographic Retention Parameters of Aliphatic Enyne Alcohols with the Data for Their Structural Analogues

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Abstract

We studied the regularities of gas-chromatographic retention indices of aliphatic enyne alcohols containing С=С and С≡С bonds in the molecule (14 secondary and two tertiary homologues) on standard nonpolar polydimethylsiloxane stationary phases, which have not been characterized in sufficient detail earlier. Using homologous increments of retention indices iRI = RI – 100x, where х = int(M/14), М is the molecular weight number, and 14 is the mass number of the CH2 homological difference, one can compare data for structural analogs, including alkanols, alkenols, and alkynols. The features of comparing iRI values for compounds belonging to different homologous groups y ≡ M(mod14), for example, CnH2n+2O (y = 4), CnH2nO (y = 2), CnH2n–2O (y = 0), and CnH2n–4O (y = 12), are discussed. The main feature is that when the boundary value of y = 0 is passed, the relation between the parameter x and the number of carbon atoms in the molecule changes due to an increase in the formal unsaturation (the condition n = x – 1 is replaced by the condition n = x). Therefore, in the latter case, 100 should be subtracted from the iRI homologous increments to compare them with the data for structural analogs of other series. Taking this correction into account, we found that the iRI values for secondary enyne alcohols (12 ± 16) and previously characterized sec-alkynols (23 ± 21) virtually coincide, and for tertiary enyne alcohols, they are consistent with the data for all considered groups of structural analogues (alkanols, alkenols, and alkynols).

About the authors

I. A. Savina

Scientific and Analytical Center for Physical, Chemical, and Ecological Research, Togliatti State University

Email: izenkevich@yandex.ru
445020, Tolyatti, Russia

D. M. Gusev

Scientific and Analytical Center for Physical, Chemical, and Ecological Research, Togliatti State University

Email: izenkevich@yandex.ru
445020, Tolyatti, Russia

T. V. Zimina

Scientific and Analytical Center for Physical, Chemical, and Ecological Research, Togliatti State University

Email: izenkevich@yandex.ru
445020, Tolyatti, Russia

A. A. Golovanov

Scientific and Analytical Center for Physical, Chemical, and Ecological Research, Togliatti State University

Email: izenkevich@yandex.ru
445020, Tolyatti, Russia

I. G. Zenkevich

Institute of Chemistry, St. Petersburg State University

Author for correspondence.
Email: izenkevich@yandex.ru
198504, St. Petersburg, Russia

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Copyright (c) 2022 И.А. Савина, Д.М. Гусев, Т.В. Зимина, А.А. Голованов, И.Г. Зенкевич