929218-52-0

Basic information

• Product Name: bis(dimethylamido)-bis(2-(N-(4-methylphenyl)iminomethyl)pyrrolyl)hafnium
• CAS NO: 929218-52-0
• Molecular Weight: 633.108
• Mol File: 929218-52-0.mol
• Article Data: 1

Chemical Properties

• CAS DataBase Reference: bis(dimethylamido)-bis(2-(N-(4-methylphenyl)iminomethyl)pyrrolyl)hafnium(CAS DataBase Reference)
• NIST Chemistry Reference: bis(dimethylamido)-bis(2-(N-(4-methylphenyl)iminomethyl)pyrrolyl)hafnium(929218-52-0)
• EPA Substance Registry System: bis(dimethylamido)-bis(2-(N-(4-methylphenyl)iminomethyl)pyrrolyl)hafnium(929218-52-0)

Safety Data

• Hazardous Substances Data: 929218-52-0(Hazardous Substances Data)

Upstream product

• 870196-78-4 tetrakis(dimethylamido)hafnium(IV) 
• 14479-37-9 2-(N-(4-methylphenyl)iminomethyl)pyrrole 

Relevant articles and documents

Preparation and characterization of iminopyrrolyl hafnium complexes as catalyst precursors for α-olefin polymerization

Amido, chloro, and benzyl hafnium complexes bearing 2-(N-aryliminomethyl)pyrrole [(R-pyr)H, 1a: R = DIP = 2-{N-(2,6-diisopropylphenyl)iminomethyl}, 1b: R = XYL = 2-{N-(2,6-dimethylphenyl)iminomethyl}, 1c: R = ANI = 2-{N-(4-methoxyphenyl)iminomethyl}, 1d: R = TOL = 2-{N-(4-methylphenyl)iminomethyl}] were prepared and characterized. The coordination modes of (R-pyr)2Hf(NMe2)2 (2a-d) depend on the bulkiness of the aromatic substituent at the imine nitrogen of the ligands. In contrast, all (R-pyr)2HfCl2 (3a-d) have a C2-symmetric octahedral structure. These diamido- and dichloro-bis(iminopyrrolyl)hafnium complexes, when combined with MMAO, become active catalysts for ethylene polymerization. Two types of hafnium benzyl complexes, (DIP-pyr)Hf(CH2Ph)3 (4a) and (DIP-pyr)2Hf(CH2Ph)2 (5a), were prepared by the alkane elimination reaction from reactions of Hf(CH2Ph)4 with controlled amounts of iminopyrrole (1a). The mono(iminopyrrolyl)hafnium tribenzyl complex (4a) exhibited a high catalytic activity for 1-hexene polymerization.