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Updated: Jul 14, 2026
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Synthesis of Esters Via a Greener Steglich Esterification in Acetonitrile
Published on: October 30, 2018
Spectra and structure of binary azeotropes V-acetone-cyclopentane
M R Jalilian1, Mansoureh Zahedi-Tabrizi
1Department of Chemistry, Faculty of Science, Al-Zahra University, Vanak, Tehran, Iran. jalilianiraj@yahoo.com
Summary
Acetone and cyclopentane form a minimum boiling azeotrope. Azeotrope formation alters vibrational modes and (1)H NMR signals, indicating molecular interactions.
Area of Science:
- Physical Chemistry
- Spectroscopy
Background:
- Azeotropes are binary mixtures that exhibit minimum or maximum boiling points.
- Understanding molecular interactions in azeotropes is crucial for separation processes.
Purpose of the Study:
- To investigate the molecular interactions in the acetone-cyclopentane azeotrope.
- To analyze spectral changes resulting from azeotrope formation using FTIR and (1)H NMR.
Main Methods:
- Fourier-transform infrared (FTIR) spectroscopy was used to analyze vibrational modes.
- (1)H Nuclear Magnetic Resonance ((1)H NMR) spectroscopy was employed to study chemical shifts.
- Analysis of boiling point depression and mole ratio (2:3) of the azeotrope.
Main Results:
- Significant changes in specific vibrational modes were observed upon azeotrope formation.
- (1)H NMR signals showed distinct positional shifts, indicating intermolecular interactions.
- The unit-structure of the cluster was deduced based on spectral and physical property data.
Conclusions:
- Azeotrope formation between acetone and cyclopentane leads to measurable changes in FTIR and (1)H NMR spectra.
- These spectral alterations provide insights into the nature and extent of molecular interactions within the azeotrope.
- The study successfully characterized the acetone-cyclopentane azeotrope through spectroscopic analysis.
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