39981-89-0Relevant academic research and scientific papers
Redox active aluminium(iii) complexes convert CO2 into MgCO 3 or CaCO3 in a synthetic cycle using Mg or Ca metal
Myers, Thomas W.,Berben, Louise A.
supporting information, p. 4175 - 4177 (2013/07/25)
Redox-active Group 13 molecules possess the unusual combination of concomitant redox and acid-base reactivity. These combined properties enable regeneration of a metal hydroxide complex in a cycle for conversion of CO 2 into carbonate salts. Reaction of (IP-) 2Al(OH) (M = Al, Ga) with 1 atm of CO2 affords [(IP -)2Al]2(μ2κ1: κ2-OCO2). Subsequent reduction affords MgCO 3 or CaCO3 and two equivalents of [(IP2-) 2Al]-, which can be reoxidized to (IP-) 2Al(OH) to close a cycle.
Photooxygenation of Silyl Ketene Acetals: Dioxetanes as Precursors to α-Silylperoxy Esters in the Silatropic Ene Reaction
Adam, Waldemar,Wang, Xiaoheng
, p. 4737 - 4741 (2007/10/02)
Photooxygenation of silyl ketene acetals afforded dioxetanes, which subsequently underwent secondary reactions to give rearrangement products (α-silylperoxy esters, major products) and cleavage products (pivalaldehyde, minor product).The kinetics of these reactions were studied by NMR and chemiluminescence.The activation energy of the chemiluminescence cleavage process was 2-3 kcal/mol higher than that of the rearrangement.In the presence of catalytic amounts of CF3COCF3 or CF3COCH3, the (E)-silyl ketene acetals rearranged into their Z isomers.Photooxygenation of the (E)- and (Z)-silyl ketene acetals showed that the cycloaddition was rigorously diastereoselective.Trapping experiments with acetaldehyde confirmed the intermediacy of 1,4-zwitterions in the rearrangement of the (E)- and (Z)-dioxetanes into α-silylperoxy esters, but such intermediates were not detected during the photooxygenation of the silyl ketene acetals; the latter proceeds presumably via perepoxides.
