“…Many quinones exhibit an interesting range of pharmacological properties, such as antibacterial, antifungal, antiviral, anti‐inflammatory, enzyme‐inhibitive, antioxidant or radical scavenging properties. Ubiquinone and vitamin K (a derivative of 1,4‐naphthoquinone) play a crucial role in the electron transfer process of the cell respiratory system of mammals . Theoretical calculations have been used only recently to characterize their electronic structures and the energetics of proton transfer and hydrogen abstraction processes, with the aim of correlating calculated quantities with their biological activities .…”