Calorimetric Study of the Enthalpies of Solution of Methyl Iodides of Dimethylamino Grosshemin and Diethylamino Grosshemin in Water and Evaluation of the Thermodynamic Properties of Their Analogues

摘要

The method of isothermal calorimetry at dilutions (moles salt/moles water) of 1 : 9000, 1 : 18000, and 1 : 36000 was applied to study the heats of solution of methyl iodides of dimethyl- and diethylamino grosshemin. The data obtained were used to calculate the standard enthalpies of solution of C_(18)H_(28)O_4NI and C_(20)H_(32)O_4NI in an infinitely diluted (standard) aqueous solution. The heats of combustion and melting of C_(18)H_(28)O_4NI and C_(20)H_(32)O_4NI were estimated. The experimental and calculational techniques were combined to calculate the standard heats of formation of methyl iodides of dimethyl- and diethylamino grosshemin and their 66 analogues.