SYNTHESIS, CHARACTERIZATION, STRUCTURE AND POSSIBLE CATALYTIC PROPERTIES OF LATO(1,4,8,11-TETRAAZACYCLOTETRADECANE)COBALT(III) NITRATE

A new complex of cobalt(III) with 1,4,8,11-tetraazacyclotetradecane (c yclam) and oxalato ion as a bidentate ligand was prepared and characte rized by elemental analysis, IR, electronic and H-1 NMR spectroscopy a nd cyclic voltammetry. X-Ray analysis has shown that this compound cry stallizes in the orthorhombic system, space group Pccn, with a = 8.583 (1), b = 12.854(2), c - 14.944(1) angstrom, V = 1649.3(4) angstrom3, Z = 4, R = 0.512, R(w) = 0.545, and has a crystallographic two-fold rot ation axis. The complex was identified as lato(1,4,8,11-tetraazacyclot etradecane)cobalt(III) nitrate, [Co(ox)cyclam]NO3 (oxH-2 - oxalic acid ), and it can be described in terms of a cis octahedral geometry with a folded cyclam configuration around the cobalt atom with the oxalato ion occupying the remaining two sites. Cyclic voltammetric data sugges t a large stability for this compound, as well as its possible catalyt ic effect on electrochemical CO2 reduction.