Reaction of trimethylaluminium with main group hydroxides: a non-hydrolysis route to methylalumoxane†

Reactivity of intramolecularly coordinated aluminum compounds to R3EOH (E = Sn, Si). Remarkable migration of N,C,N and O,C,O pincer ligands

“…It was found that Me 3 Al acts as alkylating agent in the reaction with Ph 3 EOH (E = Sn, Pb) accompaining by MAO ([MeAlO] n ) elimination. In contrast, the reaction of Ph 3 EOH (E = C, Si, Ge) did not produce MAO, rather the dimeric species [Me 2 Al(l-OER 3 )] 2 were formed via alkane elimination (Scheme 1). Obrey and Barron [3] suggested that this reaction pattern coincides with the basicity of these hydroxides.…”

“…In contrast, the reaction of Ph 3 EOH (E = C, Si, Ge) did not produce MAO, rather the dimeric species [Me 2 Al(l-OER 3 )] 2 were formed via alkane elimination (Scheme 1). Obrey and Barron [3] suggested that this reaction pattern coincides with the basicity of these hydroxides. Nevertheless reaction of (Ph 3 Sn) 2 O and Me 3 Al led to dialkylaluminum stannoxides [Me 2 Al(l-OSnPh 3 )] 2 and Ph 3 SnMe [4].…”

“…The analogous organoaluminum silanoxanes R 3Àn AlðOSiR 0 3 Þ n gain considerable attention due to their close relation to inorganic materials such as aluminosilicates and zeolites used as ion exchangers, catalyst or catalysts supports, and molecular sieves [2]. However, work dealing with the reactions of the other group 14 metal hydroxides R 3 EOH (E = Ge, Sn, Pb) with aluminum reagents are quite rare [3].…”

Triphenyltin hydroxide as a precursor for the synthesis of nanosized tin‐doped TiO2 photocatalysts

“…5 Hydroxide exchange has also been observed in the reaction between Me 3 Al and Ph 3 SnOH. 6 Because of the high polarizing power of cations in high oxidation state, their hydroxides are expected to dehydrate spontaneously to the corresponding oxides, and the reaction of TiCl 4 with Ph 3 SnOH in organic solvents was expected to proceed according to the following equation: It is known that Ph 3 SnCl adsorbs on the TiO 2 surface, 7 and adsorption should be enhanced for small amorphous TiO 2 particles precipitating from an organic solution with a high content of triphenyltin compounds. Accordingly, reaction (1) in CH 2 Cl 2 leads to amorphous TiO 2 with adsorbed organotin compounds which give rise to nanosized Ti 1−x Sn x O 2 crystalline materials by thermal or hydrothermal treatments.…”

Ethylene Polymerization Studies with an MAO Synthesized by a Non-Hydrolytic Synthetic Route

“…Recent literature reports have shown that MAO can also be obtained by the reaction between TMA and metal hydroxides like Ph 3 SnOH [4] as well as by thermal decomposition of [Me 2 Al(l-OPh 3 )] 2 . [5] In this study, we examine a straightforward and simple nonaqueous synthetic route to MAO, based on the reaction of TMA with an easily available organic compound, benzophenone, [6] and detail the reaction mechanism involved in the formation of MAO.…”