Figure 5. Molecular structure of benzo-2,1,3-thia- and selenadiazoles. A – compounds of No. 1 – 52 and No 57 – 61. X = S (No. 1–4, 6, 7, 9, 11, 12, 14–52); Se (No. 5, 8, 10, 13, 57–61). Y = H (No. 53, 55), CH3 (54), Cl(No.56); Y’ = H(No. 53, 54), Br(No.55), Cl(No. 56); B – compounds of No. 53 – 56