Cupric dimethoxide

A suspension of polymeric cupric dimethoxide in pyridine reacts with CO2 to yield the cupric methyl carbonate. The CO2 moiety is, however, very labile the insertion could be reversed by heating the reaction mixture at 80" under a stream of nitrogen [SO]. Another reversible carbon dioxide carrier was found in copper(I) rerr-butoxide, which was stabilized by rerr-butyl isocyanide. The rerr-butyl carbonato complex was formed during the reaction with CO2 [811. Carbon dioxide also reacts with ROCu(PPh3)2 0 produce (ROCOj)Cu(PPhj>3, Hydrolysis or thermolysis of these alkylcarbonato complexes gives the binuctear carbonato copper (I) complex (PPhj>2 CuCK Oj Cu(PPhj)2, which can be further convened into the bicarbonate complex f(HC)C02)Cu(PPh3)3] by reaction with CO2 in moist solvents [82],... 

Cupric dimethoxide is prepared from CuClj and LiOCHj. ... 

Reaction with carbon monoxide. Cupric dimethoxide reacts with carbon monoxide in pyridine solution at 35 70° to produce dimethyl carbonate in yields as high as 84%. 

A facile CO2 insertion into the Cu—O bond of cupric dimethoxide Cu(OMe)2 in a specific solvent (pyridine) to form a cupric methyl carbonate in which the CO2 moiety is labile has been reported ... 

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