Add time:08/30/2019 Source:sciencedirect.com
The heat capacity of 2-Amino-2-methyl-1,3-propanediol (cas 115-69-5) was measured from 280 K to the melting point by means of an automated adiabatic calorimeter. A bifurcated solid-solid transition for the compound was found with the maxima occurring at 352.89 and 353.72 K. The enthalpy of the bifurcated transition was measured and resolved by a “distributing proportionality approach” presented by the authors of this paper, obtaining the enthalpies of the solid III → II and solid II → I transitions as 5.00 and 18.46 kJ mol−1, respectively. The two transitions are attributed to breakage of the N-H · O and O-H · O hydrogen bonds in the low-temperature crystal phase of the compound, respectively.In addition, the melting temperature and enthalpy of the compound was measured at 384.08 K and 2.78 kJ mol−1, respectively.
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