Synthesis and characterization of some symmetrical substituted 1-(2-chloroethyl)pyrazole-based chalcogenides

Abstract

The present paper describes the synthesis of some symmetrical substituted 1-(2-chloroethyl) pyrazole-based dichalcogenides and monochalcogenides by reacting different 3,4,5-trisubstituted 1-(2-chloroethyl) pyrazole derivatives with in situ prepared Na2E2 (E = S, Se, Te) and sodium hydrogen selenide, respectively. All compounds were fully characterized by different spectroscopic techniques, namely, IR, 1H, 13C, 77Se nuclear magnetic resonance, and mass spectrometry. X-ray crystal structure determination of 1,2-bis(2-(4-bromo-3,5-dimethyl-1H-pyrazol-1-yl)ethyl)diselane (10b) reveals intermolecular Se·N·H interactions between two molecules. © 2017 Connect Journals.