Synthesis of half-titanocenes containing 1,3-imidazolidin-2-iminato ligands of type, Cp*TiCl2[1,3-R2(CH2N)2CN]: highly active catalyst precursors in ethylene (co)polymerisation†,10.1039/C5RA11402K

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Lactoyl-CoA 全氟丁基戊烷白叶藤碱全氟己基辛烷新白叶藤碱壳寡糖特色专题-生物多肽

Synthesis of half-titanocenes containing 1,3-imidazolidin-2-iminato ligands of type, Cp*TiCl2[1,3-R2(CH2N)2CN]: highly active catalyst precursors in ethylene (co)polymerisation†

Srisuda Patamma,Hideshi Matsuda,Shohei Katao,Ken Tsutsumi,Hiroya Fukuda

RSC Advances Pub Date : 07/22/2015 00:00:00 , DOI:10.1039/C5RA11402K

Abstract

A series of (pentamethylcyclopentadienyl)titanium(IV) dichloride complexes containing 1,3-imidazolidin-2-iminato ligands of type, Cp*TiCl₂[1,3-R₂(CH₂N)₂C [double bond, length as m-dash] N] [R = ^tBu (1a), cyclohexyl (Cy, 1b), C₆H₅ (1c), 2,6-Me₂C₆H₃ (1d), 2,6-ⁱPr₂C₆H₃ (1e)] have been prepared and structures of 1b–e have been determined by X-ray crystallography. These complexes, especially 1d,e showed notable catalytic activities not only for ethylene polymerisation, but also for ethylene/1-hexene copolymerisation (activity 482 000–1 750 000 kg-polymer per mol-Ti per h) in the presence of MAO.