127146-25-2Relevant articles and documents
Gas-Phase Chemistry of the Dimethyaluminum Oxide Ion and Related Aluminum Oxide Ions: Comparison of Reactivity with Siloxide Ions
Damrauer, Robert,Krempp, Mich?ele,Micheal,Gordon
, p. 2393 - 2400 (2007/10/02)
The anion [CH3)2Alo]- (1) has prepared In a flowing afterglow selected ion flow tube (FA-SIFT) by ion selection from the reaction mixture of trimethylaluminum dimer and hydroxide. This unusual ion is quite reactife and has extensively studied. It with halogen-containing compounds of several types, including fluorobenzene, chlorobenzene, bromofluorobenzene, acetyl chloride, and HF, to give {(CHj^AKOHJX] , where X = F, Cl, and Br. Its chemistry with hexafteorabenzene and silicon tetrafluoride has also detailed as have a number of reactions with carboxylic adds, esters, anhydrides, sulfur-containing neutrals, alcohols, water, and ammonia. The dominant reaction pattern of 1 involves six-centered processes which require a relatively acidic hydrogen and a lone pair donor atom in the neutral reactant. In these reactions, ion 1 abstracts a proton as the lone pair atom to aluminum, often with concomitant extrusion of a small, neutral molecule. We have compared the reactifity of 1 with that of [(CH3)3SiO]- and briefly examined other aluminum oiide ions. The kinetics of several reactions as well the thermochemical relationships among some of these ions have studied, Acidity studies coupled with thermochemical analysis establish that the conjugate acid of [A1O]~ is A1OH, not HA1O. Computational studies out to the reaction of trimethylaluminum and hydroxide, and the acidities and of A1OH and HA1O.
