Thestereoregularpolymerizationofmethylmethacrylate(MMA)havebeeninvestigatedwithchiralanioniccomplexinitiator[FILi-(-)SP]intoluene,THFandtoluene/THF[1/1(v/v)].ThetacticitiesofPMMAsobtainedinthethreesolventshavebeenfoundtobemainlyasyndiotactictriads(s-PMMA)withcontentof72.3,67.7and71.4%,respectively.