Catalytic “triangles”: binding of iron in task-specific ionic liquids†
Abstract
A new class of task-specific ionic liquids (ILs) which contain septuply positively charged {Fe3IIIO(RCOO)6L3}7+ triangles has been synthesized and structurally characterized. Such metal-containing ILs can be repeatedly used as alternative catalysts in the synthesis of 2-pyrrolo-3′-yloxindole or the condensation of indoles with various aldehydes.