879211-42-4Relevant academic research and scientific papers
Potential Group IV olefin polymerization catalysts that contain a diamido ligand substituted with hexaisopropylterphenyl groups
Tonzetich, Zachary J.,Schrock, Richard R.
, p. 469 - 476 (2006)
The diamine rac-H2[HIPTN2] (HIPTN2 = (N-hexa-iso-propyl-3,5-terphenyl)diaminobinaphthalene) has been prepared through palladium-catalyzed N-aryl coupling of diaminobinaphthalene and 3,5-bis(2,4,6-triisopropylphenyl)bromobenzene. The reaction between H 2[HIPTN2] and M(NMe2)4 (M = Ti, Zr, and Hf) yields [HIPTN2] M(NMe2)2 complexes. Other complexes of [HIPTN2]2- that have been prepared include [HIPTN2]ZrCl2, [HIPTN2]ZrMe 2, [HIPTN2]Zr(CH2CMe3)2, [HIPTN2]HfCl2, [HIPTN2]HfMe2, and [HIPTN2]Hf(CH2CHMe2)2. Activation of [HIPTN2]ZrMe2 with a variety of Lewis acids gives rise to different species depending on the nature of the activator employed. For example, [HIPTN2]ZrMe2 reacts with [Ph3C] [B(C6F5)4] to give a cationic complex that is active toward oligomerization of 1-hexene, while activation with B(C 6F5)3 leads to formation of [HIPTN 2]Zr(C6F5)2. No polymerization of 1-hexene by activated complexes was observed.
