Hydration of 18-crown-6 in carbon tetrachloride. Infrared spectral evidence for an equilibrium between monodentate and bidentate forms of bound water in the 1:1 crown-water adduct

Samuel A. Bryan, Richard R. Willis, Bruce A. Moyer

Research output: Contribution to journalArticlepeer-review

37 Scopus citations

Abstract

The interaction of water with 18-crown-6 (18C6) in carbon tetrachloride has been investigated by FTIR techniques. As shown by least-squares analysis, the functional dependence of the absorbance of OH stretching bands (3800-3200-cm-1 region) on the H2O and 18C6 concentrations indicates the formation of 1:1 18C6-H2O adducts, giving the value 15.6 ± 1.2 M-1 for the molar equilibrium constant at 25.0°C. The number, positions, and widths of the OH stretching bands of the 1:1 18C6-H2O adduct indicate the presence of two forms of bound water, one in which the H2O molecule dangles from an ether oxygen atom by a single hydrogen bond and one in which H2O bridges two ether oxygen atoms.

Original languageEnglish
Pages (from-to)5230-5233
Number of pages4
JournalJournal of Physical Chemistry
Volume94
Issue number13
DOIs
StatePublished - 1990

Fingerprint

Dive into the research topics of 'Hydration of 18-crown-6 in carbon tetrachloride. Infrared spectral evidence for an equilibrium between monodentate and bidentate forms of bound water in the 1:1 crown-water adduct'. Together they form a unique fingerprint.

Cite this