Benzene amination

Several reactions have been examined, again all using stabilization by 1, 2-aminated benzene units. Reactions involving RP(NR2)2 and P(NR2)3 are being studied, however, the latter have initially been easier to understand because they involve less complex stereochemistry at the phosphorus centers in the products. 

The feasibility of benzenic ring amines, benzenic ring structures and aliphatic acids oxidation by means of Fenton chemistiy was tested in synthetic, acidic wastewaters by Fenton s reagent electrogenerated at a reticulated vitreous carbon cathode using the flow-cell. The organic molecules considered were phenol (Ph), cresol (Cr), aniline (An) hydroquinone (HQ), catechol (Cat), parabenzoquinone (pBQ) and oxalic acid (OxAc). Their initial... 

Dorr, Lewis, and co-workers found evidence through quenching experiments and flash spectroscopy for a triplex in the system trans-stilbene — amine — benzene — [105]. They quenched singlet excited trans-stilbene with various mono- and diamines and found a steric effect on the quenching constant The a, co-diamines (dabco, diaminoethane, -propane and -butane) quenched the stilbene fluorescence more efficiently than the monoamines, depending on the chain length between the amino groups. This was ascribed to the formation of cyclic radical cations, with a N-N three electron a-bond. In this case, an exciplex between diamine and stilbene is formed. 

Conventionally, enamines are formed using azeotropic distillation methods to remove the by-product water from a mixture of the ketone and appropriate secondary amine. Benzene and toluene are therefore generally the solvents of choice. Taguchi and Westheimer demonstrated that molecular sieves can have a beneficial effect on this reaction, acting not only as a dehydrating agent but also as a catalyst.45... 

Conversely, nucleophilic molecules (Nu) [Lewis bases e.g., catechols, hy-droquinones, phenols, alcohols, and thiols (and their anions) aromatic hydrocarbons and amines (benzene, toluene, pyridine, bipyridine)] can be oxidized by (1) direct electron-transfer oxidation [Eq. (12.3)] or (2) by coupling with the oxidation product of H20 (or HO-), hydroxyl radical (HO-) [Eq. (12-4)] ... 

Increase of polyester fibre light stability is observed at presence of electron-acceptor para-substituents in the derivatives of 4 amine benzene. 

Here, we report on the use of trisamides as electret additives in i-PP. A general structure of these compounds is shown in Fig. 15. The molecules have a C3-symmetry and consist of a central core, three units capable of forming hydrogen bonds, and nonpolar peripheral substituents. The central core can be a triphenyl-amine, benzene, or cyclohexyl unit. The hydrogen bonds are in most cases formed via amide groups and the peripheral substituents consist of alicyclic or aliphatic linear or branched hydrocarbons. The direction of the linkage between the core and the one, two, or all three substituents can be inverted so that either the carbonyl or the amine groups are attached to the core. 

Quaternary amines, benzene, and silicones are all popular. Only a small amount is required. 

Methylenation. 2-(Phenylthio)ethanols (2), prepared from ketones (1) and phenylthiomethylhthium, undergo reductive /3-ehmination to give 1-alkenes when treated with the black reagent prepared from TiCU and L1A1H4 in the presence of a tertiary amine [ 1,8-bis(dimethylamino)naphthalene or tri-n-butyl-amine]. Benzene-dioxane is used as solvent for the elimination (4 hr. reflux). ... 

NO Name Boiling point. Melting point "d Density g/ml Amine Benzene Melling Miscellaneous... 

During the last rix years, polyaniline has given rise to an increasing interest which is reflected by the number of publications (over 450 publications and patents since January 1986). - The polymer chain (Fig. 1) can be represented as a mixture of amine-benzenic and imine-quinoi d segments depending on the oxidation state degree... 

Amines. Benzene solutions o-f Fe3nitro group oi nitroaryls to a primary amine in the presence of functional groups without methanol no amine is obtained [63]. No azo, azoxy, or CO insertion products are formed. 

For each composite isotherm, there are two real adsorption isotherms, j(xi) and ri2 X2), which can also be measured and are always positive. These two general types have been further classified into five types by Nagy and Schay (1960). The composite isotherm shown in Figure 5.8 clearly indicates the relative strengths of adsorption n-butyl amine > benzene > methyl acetate. 

At about 1951, both Wilbur Kaye at Tennessee Eastman and Harry Willis in the Plastics Division of ICI in the U.K. began exploring NIR. Wilbur Kaye modified a Beckman DU UV instrument and worked on the development of the Beckman DK for NIR. Kaye thoroughly discussed the spectra of several compounds, including hromoform, chloroform, methylene chloride, benzene, methanol, and m-toluidine. He cited potential application of the spectral region to the analysis of mixtures of organic compounds, including water in hydrocarbons and other solvents, alcohols in hydrocarbons, acids, amines, benzene, and olefins in hydrocarbons. 

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