Abstract
The heats of protonation of N-(para-substituted phenyl) glycines (R—C 6 H 4 —NHCH 2 COOH, R=CH 3 O, CH 3 , H, C1) and the heats of formation of these amino acids with copper(Ⅱ) have been determined calorimetrically at 25℃ in 30% (v/v) ethanol in the presence of 0.1M sodium perchlorate. The data obtained conform nicely to the equation △ H ML -Q-β△ H HL where △ H ML denotes the heats of formation of complex compounds, △ H HL denotes the heats of protonation of the ligands, and Q and β are constants.
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