Coupling of propylene sulfide (PS) and carbon disulfide (CS 2) catalyzed by the asymmetrical Cr(III)- bis-Schiff-base complex

摘要

AbstractWith an asymmetrical Cr(III)-bis-Schiff-base complex [Cr(L)Cl] (1;H2Lobtained from reaction of HL0((Z)-4-((2-aminophenylimino)(phenyl)methyl)-3-methyl-1H-pyrazol-5(4H)-one) and 3,5-dibromo-2-hydroxybenzaldehyde) as the catalyst, the [PPN]Cl-assisted ([PPN]+=[Ph3P=N=PPh3]+) coupling of PS (propylene sulfide) and CS2for the formation of poly[trithio]carbonate and [trithio]carbonate was efficiently realized, in which, the pre-activation of catalytic system and the coupling procedure have much influential to poly[trithio]carbonate selectivity.Graphical abstractThe pre-activated mixture of Cr(III)-bis-Schiff-base complex1and [PPN]Cl was showed to efficiently catalyze the coupling of PS and CS2, giving high poly[thrithio]carbonate selectivity especially upon 2eq. of CS2to PS.Display OmittedHighlights?Coupling of PS and CS2?Cr(III) asymmetricalbis-Schiff-base complex?Poly[trithio]carbonate and [trithio]carbonate]]>