Synthesis and structure of 1-methyl-2,6-bis(electron-withdrawing group)-substituted selenabenzenes

Abstract

Selenabenzenes 12a–c with two electron-withdrawing groups (EWGs) at the 2- and 6-positions were synthesized from dihalides 1a, 1b and 1c′via seven steps and isolated as stable compounds at room temperature. According to X-ray structural analysis of the dibenzoyl derivative 12c, the six-membered ring containing a selenium atom is almost planar and the structure of the selenium atom is tetrahedral with four sp³ hybridized orbitals.