Patent ID: 10138257

Abstract:
Phosphasalen transition metal complexes are disclosed for use in alkene polymerization to produce polyolefins. The transition metal complexes are represented by the formula: wherein M is a Group 4 metal; each of X1 and X2 is a univalent group, such as halogen or benzyl; each of R1, R2, R3, R4, R5, R6, R7, R8, R9, R10, R11, and R12 is, independently, hydrogen, a substituted or unsubstituted C1-C40 hydrocarbyl radical, etc.; and R13 is a divalent C1-C20 hydrocarbyl radical or divalent substituted C1-C20 hydrocarbyl radical comprising a portion that comprises a linking backbone comprising from 2 to 18 carbon atoms linking N1 and N2.