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Aromatic sulphonates

Aromatic sulphonic acids are frequently difficult to obtain pure, since they almost invariably decompose on attempted distillation, and many are very soluble in water such aqueous solutions on being concentrated often give syrupy solutions from which the sulphonic acid crystallises with difficulty. [Pg.178]

The mechanism of aromatic sulphonation is complex and may vary, e.g. with the concentration of water or oleum in the acid, the temperature, and the hydrocarbon. One active agent is SO3, and one simplified route may be ... [Pg.178]

B) Sulphonic Acids. Simple aromatic sulphonic acids. [Pg.317]

C) Amino-aromatic sulphonic acids. Sulphanilic acid. [Pg.318]

B) SULPHONIC ACIDS. Aliphatic sulphonic acids are rarely encountered, for they are very soluble in water, and many are deliquescent. The aromatic sulphonic acids, although less uncommon, are encountered most frequently as their derivatives e.g.t the sulphonamides, pp. 247, 251), or as nuclear-substituted acids (e.g., sulphanilic acid, p. 384). [Pg.353]

Aromatic sulphonic acids are usually soluble in water, forming a strongly acidic solution. [Pg.353]

C) AMINO AROMATIC SULPHONIC ACIDS. Sulphanilic or p-amino-benzene sulphonic acid, NH2CJH4SO3H. [Pg.380]

These salts are by far the most readily prepared derivatives (having sharp m.ps.) of the amino-aromatic sulphonic acids. [Pg.384]

Amino Aromatic Sulphonic Acids. Benzylthiouronium salts (p. 384). [Pg.402]

Amino aromatic sulphonic acid (sulphanilic acid)... [Pg.406]

COMPOUNDS DERIVED FROM AROMATIC SULPHONIC ACIDS... [Pg.820]

Sulphonic acids. The aromatic sulphonic acids and their alkali metal salts are soluble in water, but insoluble in ether (Solubility Group II). They are best characterised by conversion into crystalline S-benzyl-iso-thiuronium salts (see Section IV,33,2 and 111,85,5), which possess characteristic melting points. A more time-consuming procedure is to treat the well-dried acid or... [Pg.1077]

Exposure of the ethylidene diacetate to an aromatic sulphonic acid in the presence of five times its weight of acetic anhydride as diluent at 136°C will yield the following mixture 40% vinyl acetate 28% acetic acid 20% acetic anhydride 4% ethylidene diacetate 8% acetaldehyde. [Pg.387]

The majority of aromatic sulphonic acids aie very soluble in water, and are difficult to obtain in the crystalline form On the other hand, the sodium or potassium salts generally ciystal-lise well, and it is customary to prepare them by pouiing the sulphonic acid directly after sulphonation into a strong solution of sodium or potassium chloride (Gattermann). [Pg.292]

The photoextrusion of sulphur dioxide to form cyclophanes or other novel aromatic molecules has been reviewed and studied by Givens208-210, while the photodecomposition of aromatic sulphones to form products of radical coupling reactions has recently also received attention211. [Pg.962]

The structural requirements of sulphones to react cathodically and to possess specific electrochemical properties are summarized in Scheme 1. In other words, condition (a) means that aromatic sulphones and a unsaturated sulphones are electroactive, i.e., electron transfer to the LUMO leads to the anion radical, but a cleavage reaction (see b) is mainly observed when R S02 " is a fairly good leaving group. Consequently, the two main classes of electroactive sulphones may react differently with aromatic sulphones, ArS02—R, cleavage is strongly favoured, while with unsaturated sulphones ... [Pg.1002]

Thus, under suitable experimental conditions, all aromatic sulphones are cleaved, in most cases by a two-electron process summarized by equations 1 and 2. Such reactions have been established1-5 by means of coulometric titration, isolation of cleavage residues ArH and RH and chemical identification of the anion ArS02- (e.g. by treatment of the... [Pg.1003]


See other pages where Aromatic sulphonates is mentioned: [Pg.328]    [Pg.552]    [Pg.1083]    [Pg.108]    [Pg.332]    [Pg.98]    [Pg.109]    [Pg.111]    [Pg.982]    [Pg.1001]    [Pg.1001]    [Pg.1002]    [Pg.1003]    [Pg.1003]    [Pg.1004]    [Pg.1005]    [Pg.1007]    [Pg.1014]    [Pg.1017]    [Pg.1018]    [Pg.1021]    [Pg.1024]    [Pg.1028]    [Pg.1033]    [Pg.98]    [Pg.109]    [Pg.111]   
See also in sourсe #XX -- [ Pg.544 , Pg.546 ]




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AROMATIC SULPHONIC ACIDS AND THEIR DERIVATIVES

Amino-aromatic sulphonic acids, reactions

Aromatic amines sulphonation

Aromatic hydrocarbons sulphonation

Aromatic sulphonic acids

Aromatic sulphonic acids compounds derived from

Electrophilic aromatic sulphonation

Mechanism sulphonation, aromatic

OMPOUNDS DERIVED FROM AROMATIC SULPHONIC ACIDS

Reactions and characterisation of aromatic sulphonic acids

Sulphonates aromatic, reactions

Sulphonation aromatic

Sulphonation aromatic

Sulphonation of aromatic hydrocarbons

Sulphonation: of aromatic amines

Sulphonic acids, aromatic fatty

Sulphonic acids, reactions aromatic, derivatives

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