Cationic Metal Complex, Organometal Catalyst Having Borate-Based Bulky Anion, Method for Preparing the Same, and Method for Preparing Oligomer or Polymer Using the Same

An organometal catalyst having a cationic metal complex and a borate-based bulky anion, and being represented by the following Formula 1:

• in Formula 1,
• M is selected from the group consisting of metals in group 13,
• L is each independently a coordination solvent molecule comprising a functional group selected from the group consisting of a cyanide group, an isocyanide group, an ether group, a pyridine group, an amide group, a sulfoxide group and a nitro group,
• R1 to R4 are each independently hydrogen, a halogen group, or a substituted or unsubstituted alkyl group of C1-C20,
• R5 and R6 are each independently hydrogen, an alkyl group of C1-C20, an aryl group of C6-C20, or an allyl group,
• a, b, c and a+b+c are each independently an integer of 0 to 3, d and a+b+c+d are each independently an integer of 1 to 10,
• o, p, q and r are each independently an integer of 1 to 5, and
• x and y are an integer of 1 to 4 and are the same to each other.