An Investigation of the Temperature Dependence of a Monomer–Dimer Equilibrium Using UV–Vis and 1H NMR Spectroscopies

Hancock, Laura M.; McGarvey, David J.; Plana, Daniela

Abstract

A laboratory experiment in which 1H NMR and UV–vis spectroscopies are applied to probe the temperature dependence of a monomer–dimer equilibrium involving a cyclopentadienone derivative is described and discussed. Details of the data analysis for extraction of equilibrium constants from the raw experimental data from both techniques are provided, leading to the determination of thermodynamic parameters (ΔrH° and ΔrS°) via van’t Hoff analysis. Fully analyzed datasets are provided in the Supporting Information to aid adaptation of the experiment or its use as a data analysis activity.

Citation

Hancock, L. M., McGarvey, D. J., & Plana, D. (2023). An Investigation of the Temperature Dependence of a Monomer–Dimer Equilibrium Using UV–Vis and 1H NMR Spectroscopies. Journal of Chemical Education, 100(3), 1283-1288. https://doi.org/10.1021/acs.jchemed.2c00917

• Journal Article Type: Article
• Acceptance Date: Mar 1, 2023
• Online Publication Date: Mar 1, 2023
• Publication Date: Mar 14, 2023
• Deposit Date: May 30, 2023
• Journal: Journal of Chemical Education
• Print ISSN: 0021-9584
• Electronic ISSN: 1938-1328
• Publisher: American Chemical Society
• Peer Reviewed: Peer Reviewed
• Volume: 100
• Issue: 3
• Pages: 1283-1288
• DOI: https://doi.org/10.1021/acs.jchemed.2c00917
• Keywords: Education; General Chemistry
• Public URL: https://keele-repository.worktribe.com/output/427281