Monocyclopentadienyl transition metal catalyst and olefin polymerization process

A catalyst system comprising

• (A) a monocyclopentadienyl metal compound corresponding to the formula:
• wherein,
• M is a metal selected from the group consisting of titanium, zirconium, and hafnium;
• m is one, two, or three, depending on the valency and oxidation state of M;
• R′ is each independently selected from the group consisting of hydrogen, substituted hydrocarbyl groups, unsubstituted hydrocarbyl groups, silyl groups, germyl groups, and stannyl groups, including wherein two or more R′ groups can be joined to form a ring;
• L is a covalent bridging group containing a main group element from Group 14 selected from the group consisting of carbon, silicon, germanium, and tin,
• E is datively bonded to M, and is a main group element from Group 15 selected from the group consisting of nitrogen, phosphorous, arsenic, and antimony;
• R is independently selected from substituted hydrocarbyl groups, unsubstituted hydrocarbyl groups, and silyl groups, wherein two R-groups can be joined to form a ring, and wherein an R-group and L can be joined to form a ring;
• X is each independently selected from the group consisting of hydrogen, halides, substituted hydrocarbyl groups, unsubstituted hydrocarbyl groups, silyl groups, alkoxides, aryloxides, amides, arylamides, phosphides, arylphosphides, carboxylates, and sulfonates;
• D is a neutral Lewis base;
• and
• n is 0, 1, or 2;
• (B) an activator selected from the group consisting of;
• (1) alumoxanes;
• (2) a salt of a labile, non-coordinating anion that is able to abstract one substituent X from the compound of (A);
• and
• (3) a neutral Lewis acid that can abstract one substituent X from the compound of (A).