Mixed amines

The mixed amines are dissolved in hydrochloric acid and zinc chloride solution added. The quinoline chlorozincate, (C H7N)2,HtZnCl, crystallises out, being almost insoluble in water, while the aniline chlorozincate remains in solution. The quinoline chlorozincate is then filtered off and decomposed by alkalis, and the liberated quinoline extracted with ether or steam-distilled. 

Formation of Amines. Mono-, di-, and triaEyl amines are prepared by reaction with ammonia. The ratio of reagents determines product distribution with sufficient time and excess of aEyl chloride, tetraaEylammonium chloride [13107-10-3] and triallylamine [102-70-5] predominate. Mixed amines are prepared in similar fashion by using a substituted amine in place of ammonia they may also be prepared with allylamine [107-11-9] and a suitable organic chloride. 

Amiri AP, Haghighi ASLA, Ehsani MR (2007) Alkanolamines foaming tendency Effect of amine mixing, amine degradation and gas flow rate. Farayandno 8 2-7... 

Zhao, J. Wu, Z. C. Chen, J. C. Gold extraction from thiosulfate solutions using mixed amines. Solvent Extr. Ion Exch. 1998, 16, 1407-1420. 

H3A1 NMe3,53 whose structure has been determined by X-ray diffraction.54 Since these initial studies, comparable reactions were observed for alanes, gallanes and indanes R3M (M = Al, Ga, In R = H, halogen) with amines and phosphines, yielding bis-amine, bis-phosphine and mixed amine/ phosphine adducts. Figure 13 presents the different coordination modes that have been observed so far. 

The sorption processes for cobalt complexes can be complicated by hydrolysis reactions of the complex in solution, surface induced ligand loss processes, sorption of hydrolysis products of either amine, protonated amine, or mixed amine/aquo cobalt complexes, and oxidation/reduction processes associated with cobalt. The principal objective of the XPS studies was to evaluate, the chemical state of cobalt and amine ligands, the surface concentration of the respective elements, and the ligand to cobalt ratio as indicated by the surface nitrogen to cobalt atomic ratio. 

Boche and coworkers drew attention to the solid state structure of mixed amine-metal amide99 and silylamide-nitrile complexes100 as models of reaction intermediates. 

Split and Mix Here we use eight amines and eight carboxylic acids as our example. The amines are added to eight different reaction vessels and attached to polystyrene beads. Next, all the amines bound to polystyrene are taken and mixed in one reaction vessel. The mixed amines are then split into eight vessels of equal portions. Each of these vessels contains amines of A1 to A8 bound to the beads. Carboxylic acids are separately added to each vessel B1 to vessel 1, B2 to vessel 2, and so on. The compounds prepared would be as follow ... 

Additionally, nucleic acid bases have been used in the dynamic assembly of mixed-metal, mixed-pyrimidine metallacalix[n]arenes [47]. In this approach, Lippert and coworkers investigated the dynamic assembly of metallacalixarenes based on platinum (Pt ), palladium (Pd°), uracil, and cytosine assemblies with mixed amines. These combinations form cyclic metallacalix[n]arenes structures with n = A and = 8. Of the metallacalix[4]arenes, compounds were formed with five, six, and eight bonded metals, and a variety of nucleobase coimecfivities (UCUC and UCCU). The dynamic nature of this assembly allows access to novel and structurally diverse set of nucleobase metallacalixarenes. 

Cross-Linking of an Epoxy with a Mixed Amine as a Fimction of Stoichiometry... 

The mixed amines, CF Cls SNH2 (n=l, 2), are synthesized from the corresponding sulfenyl chlorides and ammonia at —60°C with the use of a perhalogenated solvent (58) ... 

At the time of the Garner and House review302 there were only five known complexes of Crm with two different amines this is no longer the situation (Table 50) and there seem to be no particular difficulties in obtaining mixed amine complexes.432"" 34... 

AMINES. An amine is a derivative of NH3 in which there is a replacement for one or more of the H atoms of Nil, by an alkyl group, such as -CH3 (methyl) or -C2H5 (ethyl) or by an aryl group, such as (>, H (phenyl) or i ll (naphthyl). Mixed amines contain at least one alkyl and one aryl group as exemplified by methylphenylamine CH3 Nnij O.H . When one, two, and three H atoms arc thus replaced, the resulting amines ate known as primary, secondary, and tertiary, icspectively. Thus, methylamine, CH3NH2, is a primary amine dimethylamine, iCHj) NH, is a secondary amine and trimethylamine. (CHs N. is a tertiary amine. Secondary amines sometimes are called imines tertiary amines, nitriles. 

The different reactivity of 1,2- and 1,1-acceptor/donor-substituted alkenes is paralleled by the readiness with which these compounds can be prepared. Thus, /3-amino acrylates are often spontaneously formed by mixing amines with /3-keto esters, and these derivatives have been used as protective groups for amines because of their low reactivity. a-Amino acrylates can, similarly, be prepared from a-keto esters [40], but this condensation reaction does not proceed spontaneously and requires chemical or azeotropic removal of water [41—43]. a-Amino acrylates are unstable compounds which must be stored at low temperatures [41] or N-acylated immediately after their generation [43]. 

To provide further evidence for the intermediacy of cyclic C-acyl iminium ions of the type mentioned above, a preliminary experiment was conducted (Eq. 12). It seemed reasonable that the mixed aminal linkage... 

The direct determination of some major elements (Ca, K, Mg, Na, and P) and Zn by ICP-AES was performed in powdered milk [14]. Samples were diluted with a 5 or 10 percent (v/v) water-soluble, mixed tertiary amine reagent at pH 8. This reagent mixture dissociated casein micelles and stabilized liquid phase cations. No decrease in analyte emission intensities was observed. Reference solutions were prepared in 10 percent (v/v) mixed amine solution, and no internal reference element was needed for ICP-AES. The direct technique is as fast as slurry approaches, without particle size effects or sensitivity losses. 

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