A Supported Ziegler-Type Organohafnium Site Metabolizes Polypropylene.

ABSTRACT: Cp₂Hf(CH₃)₂ reacts with silica containing strong aluminum Lewis sites to form Cp₂Hf-¹³CH₃⁺ paired with aluminate anions. Solid-state NMR studies show that this reaction also forms neutral organohafnium and hafnium sites lacking methyl groups. Cp₂Hf-¹³CH₃⁺ reacts with isotatic polypropylene (iPP, M_n = 13.3 kDa; Đ = 2.4; mmmm = 94%; ∼110 C₃H₆/Hf) and H₂ to form oils with moderate molecular weights (M_n = 290-1200 Da) in good yields. The aliphatic oils show characteristic ¹³C{¹H} NMR properties consistent with complete loss of diastereoselectivity and formation of regioirregular

SUBMITTER: Samudrala KK 

PROVIDER: S-EPMC10655186 | biostudies-literature | 2023 Nov

REPOSITORIES: biostudies-literature