Economical Oxygenation of Olefins and Sulfides Catalyzed by New Molybdenum(VI) Tridentate Schiff Base Complexes: Synthesis and Crystal Structure

Abstract

Abstract Abstract. New cis ‐dioxomolybdenum(VI) complexes (MoO 2 Y x CH 3 OH) were synthesized using MoO 2 (acac) 2 and 2[(1‐hydroxy‐2‐methylpropane‐2‐ylimino)methyl]phenol derivatives as tridentate ONO donor Schiff base ligands (H 2 Y x ). MoY 1 was crystallized in orthorhombic space group Pbca . The epoxidation of olefins using tert ‐butyl hydroperoxide and oxidation of sulfides to the sulfoxides by hydrogen peroxide were efficiently enhanced by the catalytic activity of title Mo VI complexes with excellent selectivity. The high efficiency and relative stability of the catalysts was observed by turnover number and UV/Vis investigations. The electron‐rich and bulky ligands promoted the effectiveness of the catalysts.