Recent advances in physical and inorganic chemistry / by Alfred W. Stewart ; with an introduction by Sir William Ramsay.

  • Alfred Walter Stewart
Date:
1909
Catalogue details

Licence: Public Domain Mark

Credit: Recent advances in physical and inorganic chemistry / by Alfred W. Stewart ; with an introduction by Sir William Ramsay. Source: Wellcome Collection.

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    Something evidently takes place in the series of reactions shown in (I.) and (II.) which does not occur in the direct action of acids upon the salt. If we add together the two equations (I.) and (II.), and then write the group R.CO.OH as R.CO.H + 0, we shall get the following result after cancelling out the sub¬ stances common to both sides :— NOH NH2OH |] + h2o = +o no2h no2h In other words, in the course of the reactions (I.) and (II.), we have brought about a new species of decomposition of nitro- hydroxylaminic acid, the products being nitrous acid, hydroxyl- amine, and oxygen. Thus in the foregoing paragraphs we have described no less than six different ways in which this acid can be decomposed. We may tabulate them here for the sake of clearness, adding in each case the material which forms the starting-point of the reaction— Tree acid . . . H2N203 = 2JST0 + H20 Silver salt . . . H2N203 = HN02 + NO + H Sodium salt . . H2N203 = HNQ2 + UNO „ „ . 2H2N203 = 2HN02 + (NOH)2 „ „ . 2H2N203 = 2HN02 -f N20 -b H20 and finally the indirect decomposition through the hydroximic acids— H2N203 + H20 = HN02 +. o + nh2oh 3. Nitroxyl The substance nitroxyl or dihydroxy-ammonia has not yet been isolated in the free state, owing to its extreme instability; but its properties have been studied by means of its solutions. In the previous section we discussed one reaction during which nitroxyl appears to be formed as an intermediate product; and we must now deal with one or two other methods by means of which we can obtain this body. Many unsaturated carbon compounds when treated with