Chirality is a property of molecules that have a non-superimposable mirror image, often referred to as enantiomers. These enantiomers can have different photochemical properties due to their distinct spatial arrangements. The photochemical properties of a molecule are influenced by the way it interacts with light, which can be affected by its chirality. In the presence of sunlight, chiral and achiral molecules may exhibit different photochemical behaviors.1. Absorption of light: Chiral molecules can interact differently with the polarized components of light, leading to different absorption spectra for each enantiomer. This is known as circular dichroism CD . Achiral molecules, on the other hand, do not exhibit CD, as they have no enantiomers. This difference in absorption can lead to different photochemical reactions or efficiencies for chiral molecules compared to their achiral counterparts.2. Photochemical reactions: Chiral molecules can undergo enantioselective photochemical reactions, where one enantiomer reacts preferentially over the other. This can lead to the formation of different products or different ratios of products compared to achiral molecules. In some cases, the photochemical reaction may be stereospecific, meaning that only one enantiomer undergoes the reaction, while the other remains unchanged. Achiral molecules do not exhibit such selectivity in their photochemical reactions.3. Photostability: The stability of a molecule under sunlight exposure can also be affected by its chirality. One enantiomer may be more prone to photodegradation than the other, leading to different rates of degradation for the two enantiomers. This can result in changes in the enantiomeric composition of a chiral mixture over time. In contrast, achiral molecules do not exhibit such differences in photostability.In summary, chirality can significantly impact the photochemical properties of a molecule, leading to differences in light absorption, photochemical reactions, and photostability between chiral and achiral molecules. These differences can have important implications in various fields, such as drug development, environmental chemistry, and materials science, where the photochemical behavior of molecules plays a crucial role.