Infrared and dielectric studies of chloroform as proton donor in hydrogen-bond formation
Document Type
Conference Proceeding
Date of Original Version
1-1-1967
Abstract
Infrared absorption bands of free and associated species of deuterochloroform were observed in binary solutions (with triethylamine). Temperature-dependent spectra were used to calculate the equilibrium constants at various temperatures and the heat of formation of the complex molecule. A value of 0.133±3% liter mole-1 was obtained for the equilibrium constant at 25°C. The heat of formation of the deuterochloroform-triethylamine complex was determined to be 4.0 kcal mole -1. The dielectric constant shows a substantial increase over the value predicted by Onsager's theory. This indicated that the associated complex possesses a large dipole moment. In conjunction with the infrared data, the dipole moment of the associated molecule was evaluated as 3.15×10 -18±10% cgs units. Similar infrared and dielectric measurements were carried out on deuterochloroform-acetonitrile mixtures. No strong hydrogen bonding was detected by either method.
Publication Title, e.g., Journal
The Journal of Chemical Physics
Volume
47
Issue
12
Citation/Publisher Attribution
Khare, B. N., S. S. Mitra, and G. Lengyel. "Infrared and dielectric studies of chloroform as proton donor in hydrogen-bond formation." The Journal of Chemical Physics 47, 12 (1967): 5173-5179. doi: 10.1063/1.1701775.