Synthesis, X-ray structures, and syndiospecific polymerization behavior of styrene of new (pentamethylcyclopentadientyl) titanatranes containing modified tetradentate triethanolamine ligands

Dimeric alumatranes as catalysts for trimethylsilylcyanation reaction

“…Using this idea, we have successfully prepared monomeric boratranes, 42 monomeric germatranes, 43 and monomeric or dimeric titanatranes. [44][45][46] This idea further prompted us to prepare alumatranes with tricyclic ve-membered rings, which may be dimeric in the gas phase, solution phase, and solid state.…”

Lactide Cyclopolymerization by an Alumatrane-Inspired Catalyst

“…Metallatranes, the trigonal bipyramidal complexes of tripodal tetradentate ligands, have been widely used − and continue to be an area of active research. − Of particular relevance to this work are recent examples of monomeric alumatranes. − Alumatranes are most commonly dimeric, and the alumatrane dimers which have been examined for lactide polymerization are inactive. , However, a monomeric alumatrane-isopropanol adduct capable of lactide polymerization in the melt has been reported . Further inspiration was drawn from ligand hemilability where changes in hapticity or denticity can stabilize reactive catalytic intermediates or allow substrate coordination.…”

Syndiospecific polymerization of styrene by half-titanocene catalysts with the sulfur-containing donor ligand

“…Since Ishihara succeeded in the synthesis of sPS with a half-titanocene catalyst (Cp′TiX 3 ) (2, 3), many efforts were devoted to the development of suitable catalytic systems for the synthesis of sPS (4)(5)(6)(7)(8). As the importance of Cp′ ligand on the syndiospecific polymerization of styrene was fully realized, the influence of X ligand was also taken into account.…”