VII.—On the sulphovinates; and on amylophosphoric acid and the amylophosphates

Frederick Guthrie
1857 Quarterly Journal of the Chemical Society of London  
WITB respect to the rational constitution of the sulphovinates, chemists are at present so far agreed as to admit in them the presence of sulphuric acid. An objection was formerly raised to this view, on the ground that the sulphuric acid could not be shown to exist, as such, by means of the usual reagents ; and it was assumed that the salts in question contained hyposulphuric acid. This position has, however, been overthrown, partly by the discovery of isethionic acid, partly by the observed
more » ... y by the observed behaviour of other compounds of ethyl, such as the chloride and sulphide of ethyl, in which the chlorine and sulphur are much more difficult to recognise by means of nitrate of silver than is the case with the soluble inorganic compounds of these bodies. A question, however, which still has to be answered, is -6 ' In what manner do the sulphovinates contain the sulphuric acid ? " Those chemists who look upon sulphuric acid as a bibasic acid, and express the composition of its hydrate by the formula ZHO,S,O" view, for the most part, the salts of sulphovinic acid as basic sulphates, one of whose atoms of base is potash, and the other oxide of ethyl. They accordingly class sulphovinate of potash with the so-called double salts of sulphuric acid, such as the potassio-sulphate of zinc. ASSISTANT IN THE LABORATORY OF OWEN'S COLLEGE, MANCHESTER. S,O" Sulphate of potash and zinc. KO 1 "cbo} . S206, Sulphate of potash and ethyl. Now, in the first place, this view is contradicted by the fact t*hat the oxide of ethyl in the second of these salts cannot be driven out by a more powerful base, as is the case with its analogue, the oxide of zinc, in the inorganic sulphate. Even on continued boiling with potash, the ether is not given off as alcohol. The difficulty of maintaining this view, again, is materially increased when we reflect that in the neutral sulphate of ether, the one atoiii of ether may be eliininnted or eschnnged for water c,Ir,o> . s20" c,I-I,o I< 2
doi:10.1039/qj8570900131 fatcat:35artwkpizds7fsdxojkpcr46a