Cobalt nitrogen containing

A procedure involving catalytic oxidation of sulphones has also been developed218. In this case the sulphone is mixed with sodium carbonate and cobalt(II) oxide and the mixture is burned in a stream of oxygen. This method works very well for nitrogen-containing sulphones and requires no expensive equipment. 

The second structural type found for organometallic cobalt porphyrins contains an organic fragment bridged between the cobalt and one pyrrolic nitrogen. Cobalt complexes of N-alkyl- or N-arylporphyrins arc well established (but will not be specifically addressed here). The bridged complexes are derivatives of these where the N-alkyl group also forms a cr-bond to cobalt. They are also related to the axially... 

The preparation of oximes from olefins is a valuable approach for the synthesis of nitrogen-containing compounds such as amino acids and heterocycles. Okamoto and colleagues have reported that a catalytic reduction-nitrosation of styrenes 31 with ethyl nitrite and tetrahydroborate anion by the use of bis(dimethylglyoximato)cobalt(II) complex afford the corresponding acetophenone oximes 32 (Scheme 23). 

Cobalt(II) complexes prepared in situ from (AcO Co and two novel chiral spiro nitrogen-containing ligands, 7,7/-bis(2-pyridinecarboxamido)-l,l/-spirobiindane (SIPAD) and 7,7/-bis(2-quinolinecarboxamido)-l,l/-spirobiindane (SIQAD), are efficient cata- lysts for the asymmetric Michael addition of malonates to chalcone derivatives. The alkylation products were obtained in high yields with moderate enantioselectives.169... 

Wool and Polyamide Dyes. Water-soluble formazan complexes having sulfonamide, alkylsulfonyl, or sulfonic acid groups possess a high affinity to nitrogen-containing fibers. As with acid dyes, they can be used to dye wool and polyamide in neutral to weakly acid baths. Commercial dyes of this type are C.I. Acid Blue 267 and 297, and the 1 2 cobalt complex C.I. Acid Black 180, 13710 [11103-91-6] (29). 

The equilibrium between metal-quinone redox isomers has been found to be extremely sensitive to the properties of nitrogen-donor coligands. The redox isomers, reported in Ref. 159, can exist (5.14) in the cobalt complexes containing semiquino-late (SQ) and catecholate (Cat) ligands derived from 3,5-di-/-butyl-l,2-benzoquinone (3,5-DBBQ) ... 

Ito MM, Akita K, Inoue H. Wet oxidation of oxygen and nitrogen containing organic compounds catalyzed by cobalt(III) oxide. Ind Eng Chem Rev 1989 28(suppl 7) 894-899. 

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