| Abstract
| - The existence of a copigmentation reaction was established betweenmalvin chloride (malvidin 3,5-diglucoside) and apigenin 7-glucoside (5,4‘-dihydroxyflavone7-glucoside), and optimal conditionsfor its taking place were defined. Dependencies of the process onparameters such as the pH valueof the solution, molecular concentration, and temperature were alsodetermined. The kinetic andthermodynamic parameters obtained (K = 137M-1, ΔG° = −12.2 kJ/mol,ΔH = −37.4 kJ/mol, ΔS= −84.6 J/K mol) were correlated with the structure of the flavoneused. Keywords: Copigmentation; apigenin 7-glucoside; UV−vis spectra; kineticand thermodynamicparameters
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