Catalyst systems for olefin polymerization

A procatalyst comprising a metal-ligand complex of formula (I):

• where:
• M is titanium, zirconium, or hafnium, each independently being in a formal oxidation state of +2, +3, or +4;
• and n is an integer from 0 to 3, and wherein when n is 0, X is absent;
• each X independently is a monodentate ligand that is neutral, monoanionic, or dianionic;
• or two Xs are taken together to form a bidentate ligand that is neutral, monoanionic, or dianionic;
• and X and n are chosen in such a way that the metal-ligand complex of formula (I) is, overall, neutral;
• each Z is O;
• L is (C3-C40)hydrocarbylene or (C3-C40)heterohydrocarbylene, wherein the (C3-C40)hydrocarbylene has a portion that comprises a 3-carbon atom to 10-carbon atom linker backbone linking the Z atoms in formula (I) and the (C3-C40)heterohydrocarbylene has a portion that comprises a 3-atom to 10-atom linker backbone linking the Z atoms in formula (I), wherein each of the 3 to 10 atoms of the 3-atom to 10-atom linker backbone of the (C3-C40)heterohydrocarbylene independently is a carbon atom or heteroatom, wherein each heteroatom independently is O, S, S(O), S(O)2, Si(Rc)2, Ge(Rc)2, P(RP), —N═, or N(Rn), wherein independently each RC is (C1-C30)hydrocarbyl, each RP is (C1-C30)hydrocarbyl;
• and each RN is (C1-C30)hydrocarbyl;
• R2, R3, R4, R5, R6, R7, R8, R9, R10, R11, R12, R13, R14 and R15 are independently selected from the group consisting of a (C1-C40)hydrocarbyl, (C1-C40)heterohydrocarbyl, Si(Rc)3, Ge(Rc)3, P(RP)2, N(RN)2, ORc, SRc, NO2, CN, CF3, RcS(O)—, RcS(O)2-, (Rc)2C=N—, RcC(O)O—, RcOC(O)—, RcC(O)N(R)—, (Rc)2NC(O)—, halogen atom, and hydrogen atom
• when R8 is H, R9 is a (C1-C40)hydrocarbyl;
• (C1-C40)heterohydrocarbyl;
• Si(Rc)3, Ge(Rc)3, P(RP)2, N(RN)2, ORc, SRc, NO2, CN, CF3, RcS(O)—, RcS(O)2-, (Rc)2C═N—, RcC(O)O—, RcOC(O)—, RcC(O)N(R)—, (Rc)2NC(O)—or halogen atom;
• or
• when R9 is H, R8 is a (C1-C40)hydrocarbyl;
• (C1-C40)heterohydrocarbyl;
• Si(Rc)3, Ge(Rc)3, P(RP)2, N(RN)2, ORc, SRc, NO2, CN, CF3, RcS(O)—, RcS(O)2-, (Rc)2C=N—, RcC(O)O—, RcOC(O)—, RcC(O)N(R)—, (Rc)2 NC(O)—or halogen atom;
• and
• R1 and R16 are independently selected from radicals having formula (II)
• where each R22 and R19 is independently chosen from (C1-C20)alkyl, (C3-C40)cycloalkyl, (C6-C40)aryl, (C1-C40)heterohydrocarbyl, -Si(RC)3, -Ge(RC)3, -N(RN)2, -N═RC, -ORC;
• optionally two or more of R2, R3, and R4, or two or more of R5, R6, R7, and R8, or two or more of R9, R10, R11, and R12, or two or more of R13, R14 and R15 can be covalently connect in ring structures, with such ring structures having from 3 to 50 atoms in the ring excluding any hydrogen atoms;
• each of the aryl, heteroaryl, hydrocarbyl, heterohydrocarbyl, Si(RC)3, Ge(RC)3, P(RP)2, N(RN)2, ORC, SRC, RCS(O)—, RcS(O)2-, (RC)2C═N—, RCC(O)O—, RCOC(O)—, RCC(O)N(R)—, (RC)2NC(O)—, hydrocarbylene, and heterohydrocarbylene groups independently is unsubstituted or substituted with one or more Rs substituents;
• and
• each Rs independently is a halogen atom, unsubstituted (C1-C18)alkyl, F3C—, FCH2O—, F2HCO—, F3CO—, R3Si—, R3Ge—, RO—, RS—, RS(O)—, RS(O)2—, R2P—, R2N—, R2C═N—, NC—, RC(O)O—, ROC(O)—, RC(O)N(R)—, or R2NC(O)—, or two of the Rs are taken together to form an unsubstituted (C1-C18)alkylene, wherein each R independently is an unsubstituted (C1-C18)alkyl.