Dioxide Fixation Using Reactions with Other Compounds

Carbon Dioxide Fixation Using Reactions with Other Compounds 

Electrochemical carboxylations of organic molecules such as olefins,202 aromatic hydrocarbons,203 and alkyl halides204 206 in the presence of C02 have been examined, as one of the subjects of organic electrochemistry.207 

Attempts have been made to fix C02 using organometallic complexes in photochemical reactions. A reversible binding of C02 was achieved with the Cu(I) phenylacetylide-phosphine complex,208 which acted as a reversible C02 carrier at ambient temperatures and atmospheric pressure, by C02 insertion into the 

Cu—C bond of the complex. Recently, activation of C02 as an r/1-C metalocarboxylate209 and photoinduced or thermal insertion of C02 into a metal-hydride bond210 have been reported. Furthermore, some metal (Zn2+, Ni2+, and Cd2+) complexes of tetraazacy-cloalkanes have been found to take up C02 easily in basic alcoholic solutions, and their structures have also been examined.211 More recently facile insertion of C02 into Rh2(/x-OH)2 to yield a carbonate complex of a rather complicated structure has been reported.212 

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