Mononuclear Metal–O2 Complexes Bearing Macrocyclic N-Tetramethylated Cyclam Ligands
نویسندگان
چکیده
منابع مشابه
Synthesis, Characterization, and Reactivity of Cobalt ACHTUNGTRENNUNG(III)–Oxygen Complexes Bearing a Macrocyclic N-Tetramethylated Cyclam Ligand
Oxygen-coordinating metal species, such as metal–peroxo, –hydroperoxo, and –oxo complexes (Scheme 1), have been frequently invoked as reactive intermediates in the catalytic cycles of dioxygen activation by metalloenzymes, such as heme and nonheme iron monooxygenases and copper-containing enzymes. In biomimetic studies, synthetic analogues of these active oxygen intermediates have been intensiv...
متن کاملReactivity comparison of high-valent iron(IV)-oxo complexes bearing N-tetramethylated cyclam ligands with different ring size.
The ring size effect of macrocyclic TMC ligands in nonheme iron(IV)-oxo complexes has been examined in hydrogen atom transfer (HAT) and oxygen atom transfer (OAT) reactions; an iron(IV)-oxo complex bearing a smaller TMC ligand is more reactive in both HAT and OAT reactions, resulting from its high Fe(IV/III) redox potential.
متن کاملMononuclear Manganese–Peroxo and Bis ACHTUNGTRENNUNG(m-oxo)dimanganese Complexes Bearing a Common N-Methylated Macrocyclic Ligand
Metal–oxygen adducts (Mx Ox, x=1 or 2), such as metal– superoxo, –peroxo, and –oxo species, are key intermediates often detected in the catalytic cycles of dioxygen activation by metalloenzymes. In biomimetic and synthetic chemistry, numerous Mx Ox complexes have been prepared and characterized with various physicochemical methods as structural and functional models of enzymes. Among the Mx O2 ...
متن کاملMononuclear nickel(II)-superoxo and nickel(III)-peroxo complexes bearing a common macrocyclic TMC ligand.
Mononuclear metal-dioxygen adducts, such as metal-superoxo and -peroxo species, are generated as key intermediates in the catalytic cycles of dioxygen activation by heme and non-heme metalloenzymes. We have shown recently that the geometric and electronic structure of the Ni-O2 core in [Ni(n-TMC)(O2)]+ (n = 12 and 14) varies depending on the ring size of the supporting TMC ligand. In this study...
متن کاملRuthenium indenylidene complexes bearing N-alkyl/N-mesityl-substituted N-heterocyclic carbene ligands.
We report on the synthesis and characterization of second generation ruthenium indenylidene catalysts bearing unsymmetrical N-heterocyclic carbene (NHC) ligands denoted as RuCl2(3-phenyl-1-indenylidene)(1-mesityl-3-R-4,5-dihydroimidazol-2-ylidene)(PCy3), in which R is methyl 8a, octyl 8b or cyclohexyl 8c. The characterization of 8a-c was performed by NMR spectroscopy, elemental analysis, IR, HR...
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ژورنال
عنوان ژورنال: Accounts of Chemical Research
سال: 2012
ISSN: 0001-4842,1520-4898
DOI: 10.1021/ar3000019