Abstract: Embodiments of this disclosure are directed to catalyst systems comprising a metal-ligand complex according to formula (I).

Abstract: A method of making an attenuated-light-off post-metallocene catalyst, the method comprising combining a faster-light-off catalyst with an effective amount of a kinetics modifier compound of formula (A1), (B1), or (C1): R5—C?C—R6 (A1), (R5)2C=C?C(R6)2 (B1), or (R5)(R7)C?C(R6)(R7)(C1) as defined herein under effective reaction conditions to give an attenuated post-metallocene catalyst that exhibits an attenuated light-off monomer uptake profile (relative to that of the faster-light-off catalyst); wherein the faster-light-off catalyst has been made by activating a post-metallocene precatalyst of structural formula (I) as defined herein; and related methods, compositions and uses.

Abstract: Embodiments of the present disclosure directed towards titanium biphenylphenol polymerization precatalysts of Formula (I).

Abstract: A process for the dehydrogenation of alkyl-containing compounds comprises reacting an alkyl-containing compound and a Group VI nitrosyl complex characterized as a transition metal complex having the composition Cp?M(NO)(R1)(R2), wherein Cp? is selected from certain substituted and unsubstituted ?5-cyclopentadienyl groups; M is W or Mo; and R1 and R2 are independently selected from CH2C(CH3)3; CH2Si(CH3)3; CH2(C6H5); CH3; hydrogen; and ?3-allyl; provided that if R1 is hydrogen, R2 is ?3-allyl; under conditions such that the alkyl-containing compound is converted to an olefin, and in particular embodiments, a terminal olefin. The dehydrogenation can be carried out using a neat and/or undried alkyl-containing compound and/or may be conducted under air, and does not require a sacrificial olefin to drive the reaction, thereby increasing convenience and decreasing cost in comparison with some other dehydrogenation processes.