Cationic alkylbis(cyclopentadienyl)titanium complexes. Synthesis, reactions with carbon monoxide and tert-butyl isocyanide, and the structure of [Cp2Ti[.eta.2-C(Me)NBu-tert](CNBu-tert)]BPh4.MeCN

Ansa‐Cycloheptatrienyl–Cyclopentadienyl Complexes

“…These results might suggest that 4 adopts an intermediate position between these Ti II and Ti IV complexes with respect to the strength of the titanium–isocyanide interaction. However, both shorter TiC and CN bonds are found for cationic Ti IV isocyanide complexes, such as [(η‐C 5 H 5 ) 2 Ti(CNCMe 3 )(η 2 ‐MeCNCMe 3 )]BPh 4 (TiC 2.192(6), CN 1.150(6) Å) 30…”

Gas-phase reactions of the bis(η5-cyclopentadienyl)methylzirconium cation with imines

“…The proposed resultant azomethine structures have been postulated in earlier gas-phase studies of reactions of bis(g 5 -cyclopentadienyl)methylzirconium cations with nitriles (as opposed to nitriles coordinated by the methyl zirconocene cation) [38], as well as in liquid phase studies of cationic Zr and Ti complexes [39][40][41].…”

Group 4 metal complexes for homogeneous olefin polymerisation: a short tutorial review

“…This was the first time that Group 4 cations were shown to polymerise ethylene without alkyl aluminium cocatalysts. Bochmann et al [106,107] reported titanocene analogues in the same year…”

“…As mentioned previously, in 1985 Eisch et al showed that insertion of Me 3 SiCCPh into the Ti-Me bond resulted in the formation of alkenyl complex 16. Shortly after this discovery Bochmann et al [106,107] ? , would rearrange to form a bdiketiminato complex (30) over 1 month.…”

“…Examples of Lewis bases used in this chemistry include RCN, PR 3 , THF, pyridine, NR 3 . Stronger donors such as PR 3 will replace moderately labile donors such as MeCN, but THF, being a weaker donor, will not [106]. The number of Lewis base donors that can bond to the metal centre is dependent on the radius of the metal.…”