~ , . \ . \ .
Chemical Notices from Foreign Sources. {Cigna Nav,
approach the alkaline metals very nearly in affinity
to Cl,
Action of Monochlor-acetic Acid on Sulpho-cyanic
Acid and its Salts..—M. Nencki.—'T'Le reactions were
undertaken with the view of comparing them with the
results obtained from the isomeric sulpho-urea, which
vields glycolyl-sulpho-urea. Aqueous solutions of CN SH
are eastly acted upon as fuliows: —
CNSH+CICH CO, + H,0=C;H;NSO;+ HCI,
forming carbamine-sulpho-acetic acid, which is easily dis.
solved and crystallised. It forms no salts, decomposing
in the presence of metallic oxides into cyanic acid and
sulpho-glycollic acid, The reaction between CNS.NH|
id CICHLCOH is very violent, and gives rise to rhodanic
acid, FIS.CH,CO.8.NC, a finely erystallising body, which
yiclds, with rolutions of metals possessing a strong affinity
‘or 8, mixtures of simple and double salts, Itis easily
changed by weak oxidisers into rhodanin red, —
C,H N;3550;,
which imparte a brilliant intense orchil-red to fabrics, and
a violet dyve-stotl not yet analysed. The present expense
of prepaning mono-chlor-acetic acid unfortunately prevents
the practical application. Blue and yellow dye-stutis have
ikewise been obtained from rhodanic acid.
Action of Mono-chlor-acetic Acid on the Sulphosysnates
of Aromatic Monamines.—J]., H. Jager.—
Aniline and toluidin give rise to analogous bodies of the
aeneral furmulathe
quinon, the other amido group being replaced by a
new hydroxyl,
Acid Periodides. - 8. AM. Jorgensen.— A purpurcocobalt-chloride-periadide-anlphate,-
-
(N13) 2,C0,0530;) CLT,
is obtained by adding a solution of Lin HI to the solution
of acid sulphite of purpuieo-cobdlt-chloride. The olive
green crystals are not very stable, decomposing in the
air and in the aqueous solution. Similar compounds are
formed with the radical 4N11,, Pt. As these acid periodides
show the same physical Characteristics as the iodides
of potassium-plitinum cyz2nides, the author regards them
as well-defined bodies, not molecular compounds, explaining
their structure on the theory of the polvvidence
of iodine. An appendix contains the crystallographic
properties of a number of jerivdides,
Thermo-chemical Investigations (xxiv. Platinum
and Palladiving.—J. Thomsen. ~The author dives a detailed
account of a variety of experiments on the various
salts of these metals, aecompanied by tables of the re.
sults. They coinade with the chemical dejporiment of
Poand Pd, the former showing the greatest stability in
the tetratumic compounds, the latter in the diatomic.
Signs of the Times. Il. Kolbe,—The editor of the
journal attacks, in no measured language, a recent brochure
by J. H. vant Hetf, on «The Postion of Atoms in
Space, as well as the recommendation of it by Prof.
Wislicenus. The work 1s regarded as characteristic of
the present time, when there 1s not only a poverty of cri.
ticism, but a hatred of jt and resultant from the increasing
lack of general culture, as weil as of thorou th scientific
training on the part of professors of chemistry, It ix
mn consequence of this, that that trivial, fateons natura
philosophy, with its profound intellectual air, which fifty
years azo was thrown to one si'e by exact investipaiors,
ix at present reseved by pees fo.philosophers from the
lamberaroom harbouring the hallucinations of the human
mul and the attempt made to smuprede it ke 1 painted
and bedizencd couttezan nto soaety wire it han ne
vile
Aion of K.SO; on Quinons..- I, Carstanirn. - A
fection ensues at once when the solutions ate hromat
fnsether, and the potasaum salt of the hydroqumaon.
sulphonic acid is formed, For example 1--Coadlh:0;
£ SOK: 1 HL0 = CH SOK KHO,
Thermochemical Investigations (xxv. Magnesium,
Caleinm, Suontium, and Banum).-]. Thomeen.— The
results of the experiments show that net onl the phy.
gical, bat the thermo.chemical propertics of the compiannde
of thece four metals alter regularly with the atomic
weighta, With an increase in the atomic weigat, increase
—i1) the stab lity of the oxy-hvdiates, and the thermal
Tevelopment hy ‘union with H,0 ; (2) the solubility of
the by fratez in water, and the heat of calutinn of the
Fame (3) the heat of union of tha chinnides, bromides,
iodides, nitrates, and salphates, With an increas in the
atomic weight, decreaze--(1) the affinity of the five men.
Loned walts tn H.0, the amount of water of crvstalliza.
ton, ant the amount of heat developed in uniting with
t; (2) the golubiiity of these alte, the heat developed in
olution, and their deliquescence in moist air. The atomic
We irht 1s entirely nnconnedted with the heat of neutral.
sation when the hvdrates are disealverd in water, and with
the total amoant of heat canneated with their formation,
With reard to the alts of the came metal «9h Ci, Br,
and 1. it was found that with an ancrease of the atomic
weirdhit of the clcitto-ne sativa cirment, the heat of form.
ation of the haload componnds decres-a 1, while te affinity
to water, the heat of union with water of crestallzation,
the solubility, the heat of aolubility, and the deliquezcence
increased. Of all metals Mg, Ca, br, and Ba developed
the areatest amount of Lest in the formation of the hy.
dratec from I at metal. They show alwo the rreatest
affinity for O of all elements thus far examined. and
HN ~p Ge .
Coll lIN=C-5-CILLOLIL
which have acid chara@eristics, but form no salts. Their
constitution is evidently quite different from that of the
‘hodanic acid mentioned above, the compounds decom.
posing in contact with acids into phenyl. or toluyl-carsamide
and sulpho-plycollic acid.
Benzoyl-carbonic Acid. —H. Kolbe..~The author,
ter recounting the history of the priotity of his disco.
very of the preparation of propionic aad from the adion
of HKO on C.HL.CN, in connection with Frankland as
posed to the dams of Dumas, criticises sharply the
names used by Claisen, and Habner and Backler in their
recent discovery of CAHLCOCOOH (Crm. Nrws, xxxv,,
i42, 217). The appailations phenoxylic,” ¢ phenyl.
pyvoxyh” YM artomatic pyruvic acid” and a true ketone
wel are regarded as sdentificaily incorre@. Benzoylsarbomie
aad and formyl-lenzoie acid he considers the
cofrect terms for the two acids Coll.COCOOH and
CSeHJOCH) COOH, both of which are *regarded as
wasible,
Derivatives of Paroxy-benzoic Acid.— 0. Hart:
mann.- ~The author prepares potassium phenvlatein large
juantities, by a rapid evaporation of a m:xture of 1HKO
wd phenol, and inteirayton at the right moment. The
sicpaiation of paroxy-benzoic acid from the treatment of
Call OK with CO; 12 «0 mcmphtied that it is as practical
18 the present mcthods of manufacturing salicylic acid.
A number of salts are carefully described. Paroxy-benzamide
waa prepared from the ethvlic ether by means of
NH. and found to cryetallise well, uniting with both acids
ind bases. Biv dicullation with P,0, the amide yiclds
paroxy-benzo-nitrile, or para.cvano.phenol,—
CoH LOH ICN),
which resembles “realy the meta-cvana.phennl of Griess,
hut is entirely different fiom the calicylimed of Limpricht.
Aion of Cyanogen on Albumen. 0. Locw.-—~By
varvini the amount of CN, passed thrangh a solution of
albumen, the author obtains adlitive compounds of
2ONJTLO, of JONSILO, and of SCN61L,0 with ale
bamen (CH N S000, which lose in the presence of
alkalies a part of their cyanogen and H,0, and give rise
to peenliar bodice rich in N. When an excess of C,N;
was uced, a group, Cr(11,,N,,0;,, oxamoidine, was sepaated
from the al men molecule.
