In the box to the left of the IR spectrum propose a structure consistent with the given molecular formula and IR spectrum. The absorption spectrum of caffeine in ethanol at a concentration of 9.60 ppm is given below. Caffeine does not absorb at longer wavelengths than those shown in the spectrum. Based on this spectrum, indicate whether the following statements are True or False.
Caffeine probably contains a conjugated system.
Caffeine solutions have their maximum transmittance at 272 nm. False, minimum transmittance. Caffeine would not be an effective sunscreen in the UVA region. The highest three bonding levels of caffeine are shown to be occuppied with two electrons each in the left-hand side of the diagram below. When the energy of the electromagnetic radiation matches the energy difference between two energy states of a atomic or molecular species.