Crystallization and structure of a binuclear species containing the CoC(OH)OCo moiety

A binuclear species containing the CoC(OH)OCo moiety, [(CoL)2(COOH)](ClO4)3(NCCH3)2 (L=5,7,7,12,14,14-hexamethyl-1,4,8,11-tetraazacyclotetradeca-4,11-diene) was isolated from a CO2 saturated acetonitrile/diethyl ether solution of [CoL(CO2)](ClO4) and its structure was determined. The complex consists of two [CoL]+ units connected by a bridging COOH+ in which the carbon is coordinated to one CoL+ and the non-protonated oxygen to the other CoL+ unit.