Amines ethylenediamine derivatives

Unit cells of pure cellulose fall into five different classes, I—IV and x. This organization, with recent subclasses, is used here, but Cellulose x is not discussed because there has been no recent work on it. Crystalline complexes with alkaU (50), water (51), or amines (ethylenediamine, diaminopropane, and hydrazine) (52), and crystalline cellulose derivatives also exist. Those stmctures provide models for the interactions of various agents with cellulose, as well as additional information on the cellulose backbone itself. Usually, as shown in Eigure la, there are two residues in the repeated distance. However, in one of the alkah complexes (53), the backbone takes a three-fold hehcal shape. Nitrocellulose [9004-70-0] heUces have 2.5 residues per turn, with the repeat observed after two turns (54). 

Reaction of disecondary amines and carbonyl compounds affords cyclic aminals if the amino groups are in suitable positions relative to one another (1,2-, 1,3-, or 1,4-). For example, 1,3-diamines condense readily with aldehydes or ketones to give hexahydropyrimidine derivatives,966 967 and disecpndary ethylenediamine derivatives give imidazolidines.968... 

A large group of curing agents comprises derivatives of ethylenediamine. Generally, aromatic amines such as 4,4 -diaminodiphenylmethane require higher curing temperatures than aliphatic amines such as the ethylenediamine derivatives, which cure the epoxy resin at room... 

Aldehyde-sugars (glucose) and derived disaccharides of it (lactose) in solid form are, in contrast to the keto-sugars (fructose), incompatible with strongly alkaline compounds and primary amines (ethylenediamine). A brown discolouration (caramellisation) takes place. In the case of primary amines is this called the MaUlard reaction. In mixtures of solid (anhydrous) substances these reactions proceed very slowly and they occur only on the surface of the sugar particle. Thus they may be irrelevant in practice. However, because of this incompatibility the WHO formulation for the oral rehydration salts prescribes anhydrous glucose, which moreover is not combined with sodium bicarbonate but with sodium citrate. It is preferable not to use lactose in capsules with primary aliphatic amines. A more recently reported Maillard reaction is that between lactose and fluoxetine [30]. 

Materials such as urea, ethylenediamine, monoethanolamine, and triethanolamine, and derivatives such as aniline phosphate are extensively utilized as activators in fluxes. These materials are also temperature-sensitive and, as noted above, have the potential to leave difficult-to-remove residues [102,135]. Structural and empirical formulas of several amine and derivative amine compounds, emphasizing functional features, are given in Fig. 41. 

Note. PRIMARY ALIPHATIC AMINES. The lower amines are gases or low-boiling liquids (b.ps. CHjNH, 7 CiHjNH, 17 CH,(CH2,>,NH 49 (CHg)jCHNHa, 34 ) but may be encountered in aqueous or alcoholic solution, or as their crystalline salts. They are best identified as their benzoyl, or toluene-/>-sulphonyl derivatives (c/. (C) above), and as their picrates when these are not too soluble. This applies also to benzylamine, CjHsCHjNH, b.p. 185 also to ethylenediamine, usually encountered as the hydrate, NHj (CHj)j NH2,HjO, b.p. 116 , for which a moderate excess of the reagent should be used to obtain the di-acyl derivative. (M.ps., pp. 55 55 )... 

All lene Oxides and Aziridines. Alkyleneamines react readily with epoxides, such as ethylene oxide [75-21-8] (EO) or propylene oxide [75-56-9] (PO), to form mixtures of hydroxyalkyl derivatives. Product distribution is controlled by the amine to epoxide mole ratio. If EDA, which has four reactive amine hydrogens, reacts at an EDA to EO mole ratio which is greater than 1 4, a mixture of mono-, di-, tri,-, and tetrahydroxyethyl derivatives of EDA are formed. A 10 1 EDA EO feed mole ratio gives predominandy 2-hydroxyethylethylenediamine [111-41-1], the remainder is a mixture of bis-(2-hydroxyethyl)ethylenediamines (7). If the reactive NH to epoxide feed mole ratio is less than one and, additionally, a strong basic catalyst is used, then oxyalkyl derivatives, like those shown for EDA and excess PO result (8,9). 

The first step of the reaction involves nitration of the aromatic skeleton of the substance to be detected. Then the aromatic nitro derivatives so produced are reduced with sodium dithionite, in acid medium, to the corresponding amines these are then diazotized and coupled with N-(l-naphthyl)-ethylenediamine to yield an azo dye (cf. Fig. 21). 

The previous review1 has treated in detail only the following amines methylamine, dimethylamine, trimethylamine, 2-aminoethanol, ethylenediamine, nitroguanidine and similar ones. In the period of the present review, some simple molecules of interest have been treated such as the aminoethanol series, including mono-, di- and tri-substituted derivatives, as well as a number of derivatives of guanidine. These will be dealt with for purposes of internal comparison. 

Aryl derivatives react similarly with N,iV -dimethylethylenediamine [81JCS(P1)726]. Some 5-carboxy-7-(o-hydroxyphenyl)dihydrodiazepines have been shown to react with ethylenediamine or N-methylethylenedi-amine in the presence of potassium hydroxide with cleavage of the seven-membered ring (82MI1). 

Chromium has a maximum co-ordination number of six the chromium atom, therefore, may combine with, at most, six monovalent atoms or groups, over and above its ordinary valency value, with formation of a complex radicle. Hence chromic chloride is capable of associating with, or adding on, six molecules of ammonia with formation of the derivative, [Cr(NH3)8]Cl3. Ammonia may be replaced by a substituted ammonia group or some other basic group, such as alkyl amine, pyridine, or ethylenediamine. 

Diaminoethane and derivs 5 D1136—Dl138 diaminoethane dichlorate 5 D1138 di (aminoethyl)-amine 2 B128 N,N -di-(/3-aminoethylamino)-ethane 2 B129 diaminoethylene dichlorate 5 Dl 138 N -di-(/3-aminoethyl)-ethylenediamine (TETA) 2 B129... 

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