Tetranuclear Homo‐ and Heteroalumoxanes Containing Reactive Functional Groups: Syntheses and X‐ray Crystal Structures of [{[LAl(Me)](μ‐O)(MH₂)}₂]

Abstract

There is considerable interest in organoaluminum compounds containing AlÀO bonds. This is primarily due to the discovery of methylalumoxane (MAO) as an extremely potent cocata-

Molecular Main Group Metal Hydrides

“…The combination of alcohols (or thiols) with “AlH 3 ” sources or [AlH 4 ] − yields neutral or anionic O-donor substituted aluminum hydrides, respectively. Along these lines, a number of new aluminum hydrides supported by alkoxy, aryloxy, siloxy and thiolate substituents have been reported. − A notable exception exhibiting a unique molecular structure was reported by Roesky in 2004 . Rather than using an organic alcohol, the aluminum hydroxide [( Dipp Nacnac)­Al­(Me)­OH] was combined with two equivalents of Me 3 N·AlH 3 , yielding the molecular aluminoxane [{( Dipp Nacnac)­Al­(Me)­O} 2 (AlH 2 ) 2 ] ( 572 ) (eq 67 ); the corresponding dihydrido-gallium analogue 573 was also prepared. …”

Hydrolysis of organometallic and metal–amide precursors: synthesis routes to oxo-bridged heterometallic complexes, metal-oxo clusters and metal oxide nanoparticles

“…Unlike Ligand supported aluminium hydroxide precursors. [135][136][137][138][139] the majority of ligand supported Al−OH precursors, [(LTBBP)Al(OH)·THF]3 has a trimeric structure, with a central {Al(OH)}3 core ( Fig. 10).…”

“…11). 136 This -OH deprotonation strategy has also been applied to less Brønsted basic main group reagents, such as Sn{N(SiMe3)2}2 (Fig. 11).…”

Base free lithium-organoaluminate and the gallium congener: potential precursors to heterometallic assemblies

“…Our long standing interest towards the synthesis of heterobimetallic oxides containing Al or Ga has gained a considerable shape during the recent past. The successful synthesis of terminal hydroxides of Al and Ga, LAl(Me)OH (1) [17][18][19] and LGa(Me)OH (2), 20 respectively allowed a rational design to assemble novel hetero-bimetallic systems with predictable composition and properties. 17 The unambiguous molecular structures of 3 and 4 were determined by single crystal X-ray structural analysis.…”