Triethylenetetramine

Figure 5 illustrates the type of encapsulation process shown in Figure 4a when the core material is a water-immiscible Hquid. Reactant X, a multihmctional acid chloride, isocyanate, or combination of these reactants, is dissolved in the core material. The resulting mixture is emulsified in an aqueous phase that contains an emulsifier such as partially hydroly2ed poly(vinyl alcohol) or a lignosulfonate. Reactant Y, a multihmctional amine or combination of amines such as ethylenediamine, hexamethylenediamine, or triethylenetetramine, is added to the aqueous phase thereby initiating interfacial polymerisation and formation of a capsule shell. If reactant X is an acid chloride, base is added to the aqueous phase in order to act as an acid scavenger. 

Eig. 1. Types of chelates where (1) represents a tetracoordinate metal having the bidentate chelant ethylenediamine and monodentate water (2), a hexacoordinate metal bound to two diethylenetriamines, tridentate chelants (3), a hexacoordinate metal having triethylenetetramine, a tetradentate chelant, and monodentate water and (4), a porphine chelate. The dashed lines iadicate coordinate bonds. 

Comparisons of the properties of solvent-free Hquid coatings based on unmodified bisphenol A epoxies cured with varying amine hardeners are shown in Table 6. Examples include diethylenetriamine [111-40-0] H2NC2H4NHC2H4NH2 (7), triethylenetetramine [112-24-3] ... 

Triethylenetetramine (TRIEN, TETA, trientine) [112-24-3] M 146.2, m 12°, b 157°/20mm, d 0.971, n 1.497, pK 3.32, pKj 6.67, pKj 9.20, pK 9.92. Dried with sodium, then distd under vac. Further purification has been via the nitrate or the chloride. For example, Jonassen and Strickland [J Am Chem Soc 80 312 1958] separated TRIEN from admixture with TREN (38%) by soln in EtOH, cooling to approximately 5° in an ice-bath and adding cone HCl dropwise from a burette, keeping the temperature below 10°, until all of the white crystalline ppte of TREN.HCl had formed and been removed. Further addition of HCl then ppted thick creamy white TRIEN.HCl which was crystd several times from hot water by adding an excess of cold EtOH. The crystals were finally washed with Me2CO, then Et20 and dried in a vacuum desiccator. 

Titrimetric apparatus see Graduated glassware Toluene-3,4-dithiol see Dithiol Tongs for crucibles and beakers, 98 Transmittance 648 conversion to absorbance, 709 Triangulation 245 Triethanolamine 317 Tri-n-butyl phosphate 171 Triethyl phosphate in homogeneous pptn. 425 Triethylenetetramine-fV,fV,fV, yV",fV", fV "-hexa acetic acid (TTHA) 57 Trifluoroacetylacetone 170, 237 Trimethyl phosphate in homogeneous pptn., 425... 

The hydrolyses of ADP and ATP were tried in the presence of low-molecular-weight analogs of polyethylenimine, i e. ethylenediamine, 77 (ED), diethylenetriamine, 78 (DT), triethylenetetramine, 79 (TT), tetraethylenepentamine, 80 (TP) and pentaethylenehexamine129). These compounds accelerated the reaction several times. The degree of the acceleration increased with increasing degree of polymerization. 

Cirunwald-Winstein analysis, 1,505 thiocyanates, 3, 729 thiourea, 3, 755 tricyanomethides, 3, 709 triethylenetetramine, 3, 722 tripod ligands tetradentate, 3,734... 

Cobalt, dichloro(l, 10-diamino-4,7-dithiadecane)-configuration, 1,199 Cobalt, dichloro(triethylenetetramine)-chirality, 1,194 isomerization, 1, 467 isomers, 1,201... 

In the author s laboratory, it has never been found necessary to resort to matrices other than glycerol or 1-thioglycerol for the analysis of saccharides and glycoconjugates. Nevertheless, alternative matrices are often equally effective, and, in some laboratories, they are preferred. The most widely used include tetraethyleneglycol (4) and its higher-molecular-weight relatives, the poly(ethyleneglycol)s, and such basic matrices as N,N -bis(2-aminoethyl)ethylenediamine ( triethylenetetramine, 5), 2,2 -... 

Arita and coworkers introduced a mixed matrix composed of triethanolamine, 1,1,3,3-tetramethylurea (8) and triethylenetetramine for analyzing glycosphingolipids in the negative-ion mode this gives results similar to those obtained with 1-thioglycerol. ... 

Propylene oxide was introduced into a container that contained epoxy resins it detonated. This accident was put down to compound polymerisation catalysed by triamines or superior homologues, which are used to harden resins (for example, triethylenetetramine). 

Ligand abbreviations acacjtrien = hexadentate Schiff base from triethylenetetramine (trien) and acetylacetone (acac) Saljtrien = hexadentate Schiff base from triethylenetetramine (trien) and salicylaldehyde. 

Propargylalcohol has been found to be active in corrosion control, and a variety of formulations with propargylalcohol have been proposed. A condensate of a polyamine, such as diethylenetriamine, triethylenetetramine, or... 

Polyamines are usually open chain compounds with primary, secondary, or tertiary amino groups. Instead of polyamines, polyimines are used without a sharp difference. Actually, imines are compounds with the =N— group or cycles such as ethyleneimine. Examples of oligoamines and polyamines are ethylenediamine, propanediamine, and 1,4-butanediamine and the respective products of condensation such as diethyleneamine, dipropylenetriamine, and triethylenetetramine. The compounds are colorless to yellowish liquids or solids with alkaline reaction. 

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