Volumetric, Viscometric, and 1H NMR Studies on Caffeine, Theophylline, and Theobromine in Aqueous Solutions of MgCl2 at Temperatures T = (288.15 to 318.15) K and at Pressure p = 101.3 kPa Banipal, T.S.; Beri, A.; Banipal, P.K.; Journal of Chemical & Engineering Data 2017, 62, 3833-3847