Oxidants dioxygen

Nitric Oxide Dioxygenation Reactions and Their Mechanistic Insights... 

Keywords Metal-Nitrosyls, Metal-Peroxo, Metal-Superoxo, Nitric Oxide Dioxygenation References ... 

Mechanistic Insight into the Nitric Oxide Dioxygenation Reaction of Nonheme Fe(III)-Superoxo and Mn(IV)-Peroxo Complexes... 

In this paper, author reported the reactivity of newly synthesized Fem-superoxo and MnIV-peroxo complexes with nitric Oxide (NO) to follow nitric oxide dioxygenation reactions. Reactions of nonheme Fem—superoxo and Mnlv—pcroxo complexes bearing a common tetraamido macrocyclic igand (TAML), namely [(TAML)Fem(02)]2" and [(TAML)MnIV(02)]2% with NO afford the Fem-N03 complex [(TAML)Fem(N03)]2- and the Mnv-oxo complex [(TAML)Mnv(0)]" plus N02, respectively. 

In this paper author reported the reactivity of newly synthesized Co(III)-nitrosyls complexes with superoxide radical to follow nitric oxide dioxygenation. Two new Co(III)-nitrosyl complexes bearing N-tetramethylated cyclam (TMC) ligands, [(12-TMC)-Com(NO)]2+ (1) and [(13-TMC)Coin(NO)]2+ (2), were synthesized via [(TMC)Con(CH3CN)]2+ + NO(g) reactions. Spectroscopic and structural characterization showed that these compounds bind the nitrosyl moiety in a bent end-on fashion. Complexes 1 and 2 reacted with K02/2.2.2-ciyptand to produce [(12-TMC)Con(N02)]+ (3) and [(13-TMC)Con(N02)]+ (4), respectively these possess 0,0 -chelated nitrito ligands. 

Keywords Palladium Oxidation Dioxygen Benzoquinone Catalysis... 

Binary Compounds. Three fluorides, PtF4 [13455-15-7], PtF5 [37782-184-8], and platinum hexafluoride [136934)5-5], PtF., are well documented. The last is a powerful oxidizing agent and can oxidize dioxygen and xenon (235). Two chlorides exist, platinum dichloride [10025-65-7],... 

Keywords monomers propylene oxide and styrene, selective oxidation, dioxygen, ethylbenzene, a-phenylethylhydroperoxide, nickel (II) bis (acetylacetonate), N-metylpirrolidon-2, HMPA, MSt (M=Na, K), PhOH. 

The presence on apoferritin of ferroxidase centers is suggested by four observations (1) that tbe initial oxidation step when Fe(II) is added to apoferritin requires a specific oxidant, dioxygen (48Y, (2) that Fe(III) can be produced from Fe(II) in the presence of apoferritin—and intercepted by transferrin under conditions in wbicb hydrolysis is kept... 

CYP1048A1 (TxtE) Streptomyces scabiei 87.22 4L36 Imidazole Direct nitration of L-tryptophan (using nitric oxide, dioxygen and NADPH) in thaxtomin biosynthesis [278]... 

The redox electrochemistry of a Fe /Fe couple is easily accomplished on a phthalocyanine-coated electrode with peak separations comparable to that of platinum [141,142,163,164]. Phthalocyanine-coated electrodes are found to be efficient electrocatalysts to catalys catechol, p-benzoquinone and oxalic acid oxidations [120,150]. The electrochemical activity of these electrodes may be due to the high voltage, surface area, high electronic conductivity and redox behaviour of phthalocyanine, vanadium phthalocyanine and other phthalocyanines have been prepared by vapour deposition and show photoelectrochemical responses when dipped in aqueous electrolytes [244-249]. Polymeric phthalocyanines of Co and Fe are coated on active carbon and are shown to give catalytic properties for dioxygen reduction and thiol oxidations. Dioxygen chemisorption and ammonia absorption of metallo... 

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