Heat capacity and thermodynamic properties of (1R,2S,5R)-2-i-propyI-5-methylcyclohexyl diazoacetate

Heat capacities of (1R,2S,5R)-2-i-propyl-5-methylcyclohexyl diazoacetate ha ve been measured with a small sample adiabatic calorimeter over the tempera ture range from 78 to 344 K. The melting point, molar enthalpy and entropy of fusion as well as the chemical purity of this compound were determined t o be 320.419 +/- 0.017 K, 17.203 +/- 0.005 kJ mol(-1),53.689 +/- 0.013JK(-1 ) mol(-1) and 99.61 mol%, respectively, on the basis of the heat-capacity m easurements. The extrapolated melting temperature for the absolutely pure c ompound obtained from fractional melting experiments was 320.602 K. (C) 200 0 Elsevier Science B.V. All rights reserved.