Catalysts for olefin polymerization

A compound of the formula

• wherein:
• Ar1, Ar2, Ar3 and Ar4 are each independently aryl or substituted aryl;
• R7 is hydrogen, hydrocarbyl or substituted hydrocarbyl;
• Q is sulfur, oxygen, nitrogen or phosphorous;
• n is 0 or 1;
• when n is 0 and Q is oxygen or sulfur, R1 and R2 are each independently hydrogen, hydrocarbyl, substituted hydrocarbyl or R1 and R2 taken together form a ring, R6 is not present and R5 is hydrocarbyl or substituted hydrocarbyl;
• when n is 1 and Q is oxygen or sulfur, R1, R2, R3 and R4 taken together form an aromatic ring which may be substituted, R6 is not present and R5 is hydrocarbyl or substituted hydrocarbyl;
• when n is 0 and Q is nitrogen,
• R1, R2, R5, R6 and said nitrogen together form an aromatic ring,
• or R1 is hydrogen, hydrocarbyl or substituted hydrocarbyl, R2 and R5 taken together are part of a double bond, and R6 is aryl or substituted aryl;
• when n is 1 and Q is nitrogen, R1 is hydrogen, hydrocarbyl or substituted hydrocarbyl, R1, R2 and R3 are each independently hydrogen, hydrocarbyl or substituted hydrocarbyl provided that any two of R1, R2 and R3 geminal or vicinal to each other together may form a ring, R4 and R5 taken together are part of a double bond, and R6 is aryl or substituted aryl;
• when n is 0 and Q is phosphorous R1 and R2 are each independently hydrogen, hydrocarbyl or substituted hydrocarbyl, provided that R1 and R2 taken together may form a ring, and R5 and R6 are each independently hydrocarbyl or substituted hydrocarbyl;
• when n is 1 and Q is phosphorous, R1, R2, R3 and R4 taken together form an aromatic ring which may be substituted, and R5 and R6 are each independently hydrocarbyl or substituted hydrocarbyl;
• R8 is hydrocarbyl or substituted hydrocarbyl;
• R10, R11 and R12 are each independently hydrogen, hydrocarbyl or substituted hydrocarbyl;
• R13 hydrogen, hydrocarbyl or substituted hydrocarbyl;
• and
• R14 is hydrocarbyl or substituted hydrocarbyl.

A transition metal complex of a compound of the formula

• wherein:
• Ar1, Ar2, Ar3 and Ar4 are each independently aryl or substituted aryl;
• R7 is hydrogen, hydrocarbyl or substituted hydrocarbyl;
• Q is sulfur, oxygen, nitrogen or phosphorous;
• n is 0 or 1;
• when n is 0 and Q is oxygen or sulfur, R1 and R2 are each independently hydrogen, hydrocarbyl, substituted hydrocarbyl or R1 and R2 taken together form a ring, R6 is not present and R5 is hydrocarbyl or substituted hydrocarbyl;
• when n is 1 and Q is oxygen or sulfur, R1, R2, R3 and R4 taken together form an aromatic ring which may be substituted, R6 is not present and R5 is hydrocarbyl or substituted hydrocarbyl;
• when n is 0 and Q is nitrogen,
• R1, R2, R5, R6 and said nitrogen together form an aromatic ring,
• or R1 is hydrogen, hydrocarbyl or substituted hydrocarbyl, R2 and R5 taken together are part of a double bond, and R6 is aryl or substituted aryl;
• when n is 1 and Q is nitrogen, R1 is hydrogen, hydrocarbyl or substituted hydrocarbyl, R1, R2 and R3 are each independently hydrogen, hydrocarbyl or substituted hydrocarbyl provided that any two of R1, R2 and R3 geminal or vicinal to each other together may form a ring, R4 and R5 taken together are part of a double bond, and R6 is aryl or substituted aryl;
• when n is 0 and Q is phosphorous R1 and R2 are each independently hydrogen, hydrocarbyl or substituted hydrocarbyl, provided that R1 and R2 taken together may form a ring, and R5 and R6 are each independently hydrocarbyl or substituted hydrocarbyl;
• when n is 1 and Q is phosphorous, R1, R2, R3 and R4 taken together form an aromatic ring which may be substituted, and R5 and R6 are each independently hydrocarbyl or substituted hydrocarbyl;
• R8 is hydrocarbyl or substituted hydrocarbyl;
• R10, R11 and R12 are each independently hydrogen, hydrocarbyl or substituted hydrocarbyl;
• R13 hydrogen, hydrocarbyl or substituted hydrocarbyl;
• and
• R14 is hydrocarbyl or substituted hydrocarbyl;
• wherein said transition metal is Fe, Co, Ni or Pd;
• and provided that when said transition metal is Pd, when n is 0 and Q is nitrogen R1, R2, R5, R6 and said nitrogen together do not form an aromatic ring.