Calorimetric and n.m.r. studies of hydrogen bonding involving C—H bonds. Part 1.—Chloroform and pyridine

Abstract

Nuclear magnetic resonance measurements for the system chloroform + pyridine, in the temperature range 21.7–60.0°C, have been used to estimate the standard enthalpy of association as ΔH=–10.1 kJ mole ^–1. Calorimetric measurements of the heat of mixing have been made at 25°C for binary mixtures of chloroform with pyridine and with cyclohexane. Attempts have been made to relate the spectroscopic and calorimetric results.