TELLURITO COMPLEXES - MIXED-LIGAND COMPLEXES OF COBALT(III)

New tellurito complexes, [Co(en)(2)TeO3]Cl.2H(2)O, [Co(1,2-pn)(2)TeO3] Cl.7H(2)O, [Co(en)(1,2-pn)TeO3]Cl . 5H(2)O, and [Co(en)(2)(NH3)(TeO3)( 1/2)]Br-2 . 1/2KBr . 1 1/2H(2)O where; en = ethylenediamine, pn = prop ylenediamine were synthesized. Infrared spectra of the tellurito compl exes indicate that the tellurite ligand is coordinated exclusively thr ough two of its oxygen atoms, i.e., in a bidentate form. Visible spect ra and magnetic moments of the complexes show that they are low-spin a nd hexacoordinated. The molar conductances, lambda(M), of these comple xes in water show that the complexes are completely ionized.