Computational Structure Characterization of 1,2,3-Selendiazole Isomers, Investigation of Some Molecular Properties and Biological Activities

Four different selendiazole compounds were handled by computational chemistry methods. Compounds 1,2,3- selendiazole, 1,2,5-selendiazole, 1,2,4-selendiazole and 1,3,4-selendiazole were optimized at the B3LYP/6- 31G(d) level. Structural parameters were examined. In the structural determination, IR and NMR techniques, which are spectroscopic methods, were applied. Quantum chemical parameters giving global properties such as the highest occupied molecular orbital (HOMO) energy, the lowest unoccupied molecular orbital (LUMO) energy, hardness (?), softness (?), chemical potential (?), electronegativity (?), electrophilicity index (?), nucleophilicity index (?), the electron accepting power (?+), electron donating power (?-) and polarizability were investigated for biological activities of selendiazoles. Local electrophilic and nucleophilic regions were determined using Fukui index functionals. Docking studies of the studied selendiazoles were performed with proteins representing the cervical cancer cell line and the MCF-7 breast cancer cell line.