Abstract
Aqueous solutions of complexes of iron(III) and iron(II) and the macrocyclic ligand 2,13-dimethyl-3,6,9,12,18-pentaazabicyclo(12.3.1)octadeca-1(18),2,12,14,16-pentaene (B) were investigated by voltammetry, chronocoulometry, and controlled-potential coulometry. Standard potentials for redox reactions involving species in this system, which include FeB/sup 3 +/, FeB(OH)/sup 2 +/, and FeB/sup 2 +/, as well as binuclear species such as (FeB)/sub 2/O/sup 4 +/, were obtained, and reactions involving decomposition of these at different pHs were investigated. Spectrophotometric measurements were also employed in the elucidation of the chemistry of this system. 17 references, 11 figures, 4 tables.
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