The Entropy of Hydrogen Cyanide. Heat Capacity, Heat of Vaporization and Vapor Pressure. Hydrogen Bond Polymerization of the Gas in Chains of Indefinite Length

The production of HCN dimer and more complex oligomers in dense interstellar clouds

“…This is not very different from the weak binding energy of the van der Waals dimer (3.99 kcal/mol). The calculated value of this binding energy is close to the calorimetric one of 3.28 kcal/mol (Giauque et al 1939) and the spectroscopic one (with our calculated zero-point energy correction) of 3.58 kcal/mol (Buxton et al 1981).…”

Parameters for Evaluation of the Fate, Transport, and Environmental Impacts of Chemical Agents in Marine Environments

“…There are numerous published values for the boiling point of pure hydrogen cyanide, 87,89-100 all in excellent agreement; the mean boiling point value from these studies is 25.9 ( 0.3°C. Similarly, there are many published values giving similar values for the melting point of pure hydrogen cyanide; 91,93,94,[101][102][103][104][105][106][107] the mean melting point value from these studies is -13.33 ( 0.05°C. Several others reported melting points that are significantly lower, suggesting that less pure material was used for those measurements.…”

From Democritus to Schrödinger: a reflection on quantum molecular modeling

“…Since the experimental calorimetric work of Giauque and Ruehrwein [78], studies were undertaken of hydrogen cyanide and its clusters. HCN is assumed to be: a principal product of the primitive earth atmosphere [79], a plausible prebiotic agent for the formation of amino acids and purines and pyrimidines bases [80][81][82][83][84][85].…”