Dimethyl azobenzene

Azido-2,3 - Dimethyl azobenzene yel lifts (from ale), mp 58-60° or red-brn ndls (from ale), mp 67° other props and prepn are given... 

Dimethylaniline. See Aminoxylene A272 Dimethyl azobenzene. See Azotoluene A660-L Dimethylazoxybenzene. See Azoxytoluene A672-L... 

Fig. 13 Light induced replacement of trans-4,4-dimethyl azobenzene by n-tridecane or benzamide dimer in 2 2 (top). Appropriate regions of the H NMR spectra (mesitylene-di2, 20°C) are shown before irradiation (when trans-azobenzene is the only guest) and after irradiation at 365 nm wavelength for 50 min at 20°C (either n-tridecane or benzamide dimer is the only guest). After heating the sample to 160°C for 2 min, the initial state is reversibly restored (bottom)...

SYNS AAT o-AAT o-AMIDOAZOTOLUOL (GERMAN) AMINOAZOTOLUENE (indicator) o-AMINOAZOTOLUENE (MAK) 4 -AMINO-2,3 -AZOTOLUENE 4 -AMINO-2 3 -AZOTOLUENE o-AMINOAZOTOLUENO (SPANISH) o-AMINO-AZOTOLUOL 4-AMINO-2 ,3-DIMETHYL-AZOBENZENE 4 -AMINO-2,3 -DIMETHYL-AZOBENZENE o-AT BRASILAZINA OIL YELLOW R BUTTER YELI-OW C.1.11160 C.1.11160B C.I. SOLVENT YELLOW 3 2, 3-DIMETHYL-4-AMINOAZOBENZENE FAST GARNET GBC BASE FAST OIL YELLOW FAST YELLOW AT FAST YELLOW B HIDACO OIL YELLOW 2-METHYL-4-((2-METHYLPHENYL)-AZO)BENZENAMINE OAAT ... 

C14H14N2 2,2 -dimethyl azobenzene 584-90-7 65.00 1.0215 1 27263 C14H1503F trans-2-(4-lluorobenzoyl)-1-cyclohexane-carb 111857-42-2 25.00 1.1677 2... 

Fujita used his capsules 8 for the stabilization of unfavored conformations. The treatment of an aqueous solution of capsule 8 with a solution of 4,4-dimethyl-azobenzene (cis-trans, 1 6) in hexane resulted in the formation of an unusual complex within the capsule walls the capsule selectively entrapped two equivalents of the cis-isomer (2D NMR). The cis-azobenzene molecules were stabilized within this encapsulation complex (Fig. 6) exposing the solution to visible light for several weeks did not result in the production of any of the thennodynamically favored rraw -azobenzene. Most probably the dimeric hydrophobic guest complex was formed inside the capsule it is too large to penetrate as is. so it enters as a single species. 

The first N-thiosulfinylamine 4-Me2NC6H4N=S=S (10.2) was obtained as a deep violet solid (/Inmx 510 nm) in low yield by the reaction of phosphorus pentasulfide with N,N-dimethyl-4-nitrosoaniline. Compound 10.2 (M.p. 113-115°C) has much higher thermal stability than the corresponding thionitrosoarenes, but it decomposes to the corresponding azobenzene and sulfur on heating to 200°C. 

Rzdtc) ] reacts with diethyl azodicarboxylate, azobenzene, or dimethyl acetylenedicarboxylate to give the appropriate hydrazine and disulfide... 

A number of other ligand groups are found to add to [Ni(CNBu )2] t, including azobenzene, tetracyanoethylene, fumaronitrile, and maleonitrile, diphenylacetylene and dimethyl acetylenedicarboxylate 109,110) [Eq. (29)]. 

However, cycloauration is, sometimes, difficult to achieve with direct activation of a C—H bond and transmetallation reaction of organomercury or organotin compounds with the appropriate gold compounds is, hence, frequently used. This procedure has been used with azobenzene, 36 A, A -dimethylbenzilamine,1937,1938 4,4 -dimethyl-2-phenyl-l, 3-oxaazoline,1938 1 - (dii zene,... 

Two commercial disazo disperse dyes of relatively simple structure were selected for a recent study of photolytic mechanisms [180]. Both dyes were found to undergo photoisomerism in dimethyl phthalate solution and in films cast from a mixture of dye and cellulose acetate. Light-induced isomerisation did not occur in polyester film dyed with the two products, however. The prolonged irradiation of Cl Disperse Yellow 23 (3.161 X = Y = H) either in solution or in the polymer matrix yielded azobenzene and various monosubstituted azobenzenes. Under similar conditions the important derivative Orange 29 (3.161 X = N02, Y = OCH3) was degraded to a mixture of p-nitroaniline and partially reduced disubstituted azobenzenes. 

Two experimental systems have been used to illustrate the theory for two-step surface electrode mechanism. O Dea et al. [90] studied the reduction of Dimethyl Yellow (4-(dimethylamino)azobenzene) adsorbed on a mercury electrode using the theory for two-step surface process in which the second redox step is totally irreversible. The thermodynamic and kinetic parameters have been derived from a pool of 11 experimental voltammograms with the aid of COOL algorithm for nonlinear least-squares analysis. In Britton-Robinson buffer at pH 6.0 and for a surface concentration of 1.73 X 10 molcm, the parameters of the two-step reduction of Dimethyl Yellow are iff = —0.397 0.001 V vs. SCE, Oc,i = 0.43 0.02, A sur,i =... 

The iron salts of the dimethyl ester of acetylhematoporphyrin and of the tetramethylhematoporphyrin yield verdoparahematin when treated with fermenting yeast under anaerobic conditions. The reduction product has been isolated by Stier as a double compound with pyridine. Mention may also be made of the reduction of hydroxyhemoglobin by means of yeast, which has been investigated more closely by Neumann. A few acid and basic dyestuffs are very slowly cleaved by reduction with fermenting yeast. In the case of p-aminoazobenzene, p-dimethylamino-azobenzene and 2,4-diaminoazobenzene, aniline has been claimed as the... 

Azoxyleiie Azoaimefhyl benzene or Tefra-methylazobenzene (called Bis-[dimethyl-phenyll-diimid Tetrameth.yl. zobenzoJ or Azoxylol in Get), (HjC)a-CsHj-N N-C6Ha--(CHj)a, mw 238.32, N 11.76%. Five isomers are listed in the literature 4,4 -azo-o-xyIene or 3,4,3 4 -Tetramethyl-azobenzene (Ref 1) 4,4 -azo-m-xylene or Z S -tetramethyl-azobenzene (Ref 2) 4,5 azo-m-xylene or... 

The incorporation of a cationic azobenzene derivative, p-( a> -dimethyl-ethanolammonioethoxyj-azobenzene bromide, into nanoporous silica films and the photochemical reactions of the adsorbed dye were investigated. The nanoporous silica films were prepared from tetramethoxysilane and octadecyltrimethyl-ammonium chloride by the rapid solvent evaporation method which we have reported previously. The adsorption of the cationic azo dye was conducted by casting an ethanol solution of the dye onto the nanoporous silica films. Upon UV light irradiation, trans-azobenzene isomerized photochemically to the c/s-form and photochemically formed c/ s-form turned back to the frans-form upon visible light irradiation. The nanoporous silica films were proved to be an excellent reaction media to immobilize organic photocromic species. 

Aromatic and heterocyclic nitro compounds are readily reduced in good yield to the corresponding amines (e.g. o-aminophenol, Expt 6.50) by sodium borohydride in aqueous methanol solution in the presence of a palladium-on-carbon catalyst. In this reduction there is no evidence for the formation of intermediates of the azoxybenzene or azobenzene type, although if the reaction is carried out in a polar aprotic solvent, such as dimethyl sulphoxide, azoxy compounds may sometimes be isolated as the initial products. 

Azinphos-methyl, see O, <9-Dimethyl-S- [(4-oxo-1,2,3-benxotriazin-3 [477]-yl)methyl] phosphorodithioate, 3301 cis-Azobenzene, 3478... 

SYNS C.1.13020 C.I. ACID RED 2 p-piMETHYLAMINO)AZOBENZENE-o-CARBOXYLIC ACID 4 -DIMETHYLAMIN0AZ0BENZENE-2-CARBOXYLIC ACID o-((p-(DIMETHYLAMINO)-PHENYL)AZ0)BENZ0IC ACID 2-((4-DIMETHYL-AiMINO)PHENYLAZO)BENZOIC ACID METHYL RED... 

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