Abstract
In some former papers* I have had occasion to describe a peculiar class of nitrogen-compounds, obtained by the action of nitrous acid upon amido-compounds, by the exchange of some of the hydrogen of the latter for the nitrogen of the nitrous acid. This substitution may be effected in two different ways ; accordingly every amido-compound may give rise to two distinctly different series of bodies. By viewing the amido-compounds as constructed according to the general formula C
x
H
y
- 2
(N H
3
)" O
z
, the changes may be expressed as follows: — I. 2[C
x
H
y
- 2
(N H
3
)"O
z
] + NH O
2
= C
2
x
H
2(
y
-2)
(N H
3
)" (N
2
)"O
2
x
+ 2H
2
O. II. C
x
H
y
- 2
(N H
3
)" O
z
+ NHO
2
= C
x
H
(
y
- 2)
(N
2
)O"
z
+ 2H
2
O. In the first equation one atom of nitrogen is substituted for three atoms of hydrogen contained in
two
atoms of the amido-compound, but in the second the substitution affects only
one
atom of the latter. I have hitherto directed my attention more particularly to the members of the first group, whether derived from amido-acids (such as diazo-amido-benzoic acid), or whether corresponding to amido-bases (diazo-amidobenzol). The bodies which I now shall have to describe in this communication are derived according to the second of the above general equations, and I have restricted myself almost entirely to the study of those which can thus he obtained from aniline and similar bases.
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