The ethylene/cyclopentadiene (CPD) copolymerization behavior by using fluoro-substituted bis(,β,-enaminoketonato) titanium complexes [FC,6,H,4,NC(CH,3,)CHCO(CF,3,)],2,TiCl,2, (,1a−1c,) has been investigated in detail. Upon utilizing MMAO as a cocatalyst, complexes ,1a−1c, exhibit high catalytic activities, affording the copolymers with high molecular weight and unimodal molecular weight distribution. Compared with non-substituted complex [C,6,H,5,NC(CH,3,)CHCO(CF,3,)],2,TiCl,2, (,1,), complexes ,1a−1c, can produce the copolymers with CPD incorporation adjusted in a wide range due to the enhancement of electrophilicity of metal center caused by introducing electron-withdrawing groups. Especially complex ,1c, bearing fluorine at the ,para,-position of ,N,-aryl moiety provides the highest CPD incorporation, which is nearly two times (18.5 mol%) higher than the non-substituted complex ,1, (8.9 mol%) under the same conditions. The highest CPD incorporation up to 24.6 mol% can be easily achieved using this complex. ,1,H- and ,13,C-NMR spectra demonstrate that these fluoro-substituted complexes possess regioselective nature with exclusive 1,2-insertion fashion, and alternating ethylene-CPD sequence can be detected at high CPD incorporation.