197729-22-9Relevant academic research and scientific papers
Solution structures and exchange phenomena of the new alkene polymerization initiators (η-C5Me5)TiMe(E)(μ-Me) B(C6F5)3 (E = C6F5, OC 6F5) and [(η-C5
Tremblay, Tracey L.,Ewart, Sean W.,Sarsfield, Mark J.,Baird, Michael C.
, p. 831 - 832 (2007/10/03)
The solution structures and dynamics of the new alkene polymerization initiators (η-C5Me5)TiMe(C6F 5)(μ-Me)B(C5F5)3 2, (η-C5Me5)TiMe(OC6F 5
Synthesis of a series of new, highly electrophilic, monocyclopentadienyltitanium olefin polymerization initiators
Sarsfield, Mark J.,Ewart, Sean W.,Tremblay, Tracey L.,Roszak, Aleksander W.,Baird, Michael C.
, p. 3097 - 3104 (2007/10/03)
The new compounds Ti(η-C5Me5)Me2E (E = C6F5 or OC6F5) and Ti(η-C5Me5)Me(OC6F5)2 have been synthesized and characterized by a variety of techniques, including 47/49Ti NMR spectroscopy. All three compounds react with the borane B(C6F5)3 to form the highly electrophilic but thermally unstable species Ti(η-C5Me5)Me(E)(η-Me)B-(C6F 5)3 and [η-C5Me5)Ti(OC6F5) 2][BMe(C6F5)3], the solution structures and dynamics of which are investigated and compared with those of the known compound Ti(η-C5Me5)Me2(η-Me)B(C 6F5)3,. Interestingly, Ti(η-C5Me5)-Me(C6F 5)(η-Me)B(C6F5)3 undergoes neither significant ion-pair dissociation to the solvent separated ions [(η-C5Me5)TiMe(C6F5)] + and [BMe(C6F5)3]- nor borane dissociation to its precursors (η-C5Me5)TiMe2(C6F5) and B(C6F5)3; indeed, both rotation about the Ti-C6F5 bond and inversion at the chiral metal are slow on the NMR time-scale. In contrast, Ti(η-C5Me5)Me(OC6F 5)(η-Me)B(C6F5)3 is more labile and, like Ti(η-C5Me5)Me2;(η-Me)-B(C 6F5)3, undergoes ion-pair dissociation, while [(η-C5Me5)Ti(OC6F5) 2][BMe(C6F5)3] exists in solution as the solvent separated ion species [(η-C5Me5)Ti(OC6F5) 2]- and [BMe(C6F5)3]- in equilibrium with its precursors, (η-C5Me5)TiMe(OC6F5)2 and B(C6F5)3.
