Method for preparing transition metal complexes, transition metal complexes prepare using the method, catalyts composition containing the complexes

A method for preparing a transition metal complex, comprising the steps of:

• (a) reacting an amine-based compound represented by Formula 1 below with an alkyl lithium, and then adding a compound containing a protecting group (-R0) thereto to prepare a compound represented by Formula 2 below;
• (b) reacting the compound represented by Formula 2 with an alkyl lithium, and adding a ketone-based compound represented by Formula 3 below to prepare an amine-based compound represented by Formula 4 below;
• (c) reacting the compound represented by Formula 4 with n-butyl lithium to prepare a dilithium compound represented by Formula 5 below;
• and
• (d) reacting the compound represented by Formula 5 with MCl4 (M=Ti, Zr, or Hf) and an organic lithium compound to prepare a transition metal complex represented by Formula 6 below:
• wherein
• R0 is a protecting group;
• R1, R2, R3, and R4 are each independently a hydrogen atom;
• a silyl radical;
• an alkyl radical having 1 to 20 carbon atoms or an aryl radical having 5 to 20 carbon atoms;
• an alkenyl radical having 2 to 20 carbon atoms, an alkylaryl radical having 6 to 20 carbon atoms, or an arylalkyl radical having 6 to 20 carbon atoms;
• or a metalloid radical of a metal belonging to Group 14 substituted with a hydrocarbyl having 1 to 20 carbon atoms;
• at least two of R1, R2, R3, and R4 may be connected to each other to form an aliphatic ring having 5 to 20 carbon atoms or an aromatic ring having 5 to 20 carbon atoms;
• at least two of R1, R2, R3, and R4 may be connected to each other by an alkylidine radical having 1 to 20 carbon atoms, containing an alkyl radical having 1 to 20 carbon atoms or an aryl radical having 5 to 20 carbon atoms to form a ring;
• R5, R6, R7, and R8 are each independently a hydrogen atom;
• a halogen radical;
• or an alkyl radical having 1 to 20 carbon atoms or an aryl radical having 5 to 20 carbon atoms;
• and at least two of R5, R6, R7, and R8 may be connected to each other to form an aliphatic ring having 5 to 20 carbon atoms or an aromatic ring having 5 to 20 carbon atoms;
• R9 is a hydrogen atom;
• a branched or linear alkyl radical having 1 to 20 carbon atoms;
• or an aryl radical having 5 to 20 carbon atoms;
• M is a transition metal belonging to Group 4;
• and
• Q1 and Q2 are each independently a halogen radical;
• an alkylamido radical having 1 to 20 carbon atoms, or an arylamido radical having 5 to 20 carbon atoms;
• an alkyl radical having 1 to 20 carbon atoms, an alkenyl radical having 2 to 20 carbon atoms, an aryl radical having 5 to 20 carbon atoms, an alkylaryl radical having 6 to 20 carbon atoms, or an arylalkyl radical having 6 to 20 carbon atoms;
• or an alkylidene radical having 1 to 20 carbon atoms.