Dioxygen reactivity of fully reduced [LFeII center dot center dot center dot Cu-I](+) complexes utilizing tethered tetraarylporphyrinates: Active site models for heme-copper oxidases
Td. Ju et al., Dioxygen reactivity of fully reduced [LFeII center dot center dot center dot Cu-I](+) complexes utilizing tethered tetraarylporphyrinates: Active site models for heme-copper oxidases, INORG CHEM, 38(10), 1999, pp. 2244
For O-2-reactivity studies aimed at modeling aspects of heme-copper oxidase
enzyme function, use of heterobinucleating ligands (6-pyridyl (L-6) or 5-p
yridyl (L-5) connection) gives rise to iron(II) (with "empty-tether"), 2a a
nd 2b, and [LFeII... Cu-I](+) complexes, 3a and 3b, respectively. Reduced c
omplexes 2 and 3 can exist in high-, intermediate-, or low-spin iron(II) co
nfigurations, depending on the solvent employed. Reaction of dioxygen with
both 3a and 3b leads to a biomimetic reductive O-O bond cleavage forming mu
-oxo species [(L)Fe-III-O-Cu-II](+) (4a, 4b). The X-ray structure of 4a is
reported.