The reaction of an aromatic heterocycle with a proton is called a protonation. One of articles about this theory is 《Heat capacities and thermodynamic properties of globular molecules. IV. Pentaerythrityl chloride, bromide, and iodide from 6 to 3O0°K》. Authors are Payne, Donald H.; Westrum, Edgar F. Jr..The article about the compound:Pentaerythrityltetrabromidecas:3229-00-3,SMILESS:BrCC(CBr)(CBr)CBr).Recommanded Product: 3229-00-3. Through the article, more information about this compound (cas:3229-00-3) is conveyed.
cf. CA 56, 12379a. The heat capacities of the title compounds were determined by adiabatic calorimetry from 6 to 300°K., and the entropies, enthalpies, and free-energy functions evaluated. The entropies at 298.15°K. are 61.54, 69.58, and 75.70 cal./mole °K. for the chloride, bromide, and iodide, resp. Although the general temperature dependences of the heat capacities are of the usual sigmoid character, the chloride and the bromide both show a region of anomalously slow absorption of energy.
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Reference:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem