Ever since their discovery, Ionic Liquids have raised great interest in organic
transformations ranging from solvents to catalytic entities. These belong to a class of nonmolecular compounds composed of ions having curiously low melting points. In the last few
years, the Supported Ionic Liquids have drawn the attention of researchers and chemists due
to their advantages over homogeneous catalysis. The most commonly used support for immobilized ionic liquids is polymeric. Due to its efficient recovery, reusability and chemical
inertness, Merrifield resin can be considered an excellent solid support for ionic liquids. The
present review summarizes the synthesis and application of Merrifield Resin Supported Ionic
Liquids (MRSILs). The MRSILs can be synthesized by the immobilization of amines like
ammonium, choline, imidazolium, DABCO, DMAP, pyridine, and many other functionalized
precursors. Additionally, these MRSILs play an incredible role in the field of catalysis, where
both metal-free and metal-containing MRSILs are embodied as a catalyst.