title: Interaction of theobromine with sodium benzoate.
abstract: The interaction of theobromine with sodium benzoate was investigated by PMR spectroscopy. The interaction of theobromine with pentadeuterated benzoic acid (benzoic acid-d5) was examined in the same manner but to a lesser degree. Chemical shifts of theobromine protons were determined as a function of sodium benzoate concentration in deuterium oxide at 30 and 15 degrees. Signals of both methyl groups of theobromine underwent significant upfield shifts when sodium benzoate was added to a theobromine solution. This fact suggests that a complex is formed by vertical stacking or plane-to-plane stacking. The same results were obtained for benzoic acid-d5.
mesh_terms: D001565:Benzoates; D019817:Benzoic Acid; D055598:Chemical Phenomena; D002627:Chemistry, Physical; D009682:Magnetic Resonance Spectroscopy; D011522:Protons; D013805:Theobromine; D013816:Thermodynamics
chemical_list: D001565:Benzoates; D011522:Protons; D019817:Benzoic Acid; D013805:Theobromine