A Comprehensive Treatise on Inorganic and Theoretical Chemistry

414 INORGANIC AND THEORETICAL CHEMISTRY
water, but freely soluble in hot water ; it dissolves in aq. ammonia ; ammonium
bromide precipitates the red bromide; ammonium chloride precipitates the chloride ;
silver nitrate precipitates silver bromide in cold soln., and with boiling soln., the
hydroxybromotetramminonitrate is formed ; potash lye forms an orange-red soln.
but no ammonia is given off, but that gas is evolved with the heated lye ; alkali
carbonates give a mixed precipitate ; sodium phosphate precipitates phosphatotetramminobromide
; and potassium ferrocyanide gives a red precipitate.
P. T. Cleve prepared platinic bromonitratotetramminonitrate, [Pt(NH3)4(N03)-
Br](NOs)2, by the action of an excess of cone, nitric acid on the hydroxybromotetramminonitrate.
The lemon-yellow powder contains rhombic prisms. The salt is
hydrolyzed by water to hydroxybromotetramminonitrate. A. R. Klien studied
the action of water, acids, and alkaline soln. P. T. Cleve reported platinic hydroxydinitratotriamminobromide,
[Pt(NHg)3(NOa)2(OH)]Br-H2O, by the action of the
theoretical amount of silver nitrate on the bromodinitratoamminobromide.
The straw-yellow scales are soluble in water, and an aq. soln. of silver nitrate
precipitates part of the bromide from cold soln., and all is removed from boiling
soln. P. T. Cleve also obtained platinic bromodinitratotriamminobromide,
[Pt(NH3)3(N03)2Br]Br.H20, by the action of bromine on platinous nitratotriamminonitrate.
The golden yellow scales are soluble in water, and silver nitrate
precipitates all the bromine from boiling soln., and forms the dihydroxynitratotriamminonitrate.
L. A. Tschugaeff prepared platinic chloroamidotetramminonitrate,
IPt(NHg)4(NH2)ClJ(NOa)2 ; and B. E. Dixon, platinic dichloroamidotriamminonitrate,
IPt(NHa)3(NH2)Cl2]NO3. S. G. Hedin described platinic dibromoquaterpyridinenitrate,
[Pt(C5H5N)4Br2](NOa)2, platinic dibromoquaterpyridinehydronitrate,
[Pt(C5H5N)4 Br2](N03)2.HN 03.3H20, platinic bromonitratoquaterpyridinehydronitrate,
[Pt(C6H5N)4(N03)Br](N03)2.HN03 ; and platinic dibromodinitratobisethylselenine,
[Pt{(C2H5)2Se}2(N03)2Br2].
P. T. Cleve prepared platinic diiodotetramminonitrate, [Pt(NH3)4I2](N03)2, by
the action of an excess of tincture of iodine on a soln. of platinous tetrarnminonitrate.
The dark brown precipitate crystallizes from its hot, aq. soln. in dark
brown scales. When the aq. soln. is boiled, iodine is given off, and when the soln. is
shaken with mercury, mercuric iodide is formed. Ammonia converts the boiling
aq. soln. into platinum diiodohexammino-/x-diimidonitrate, [I(NH3)3Pt(NH)2-
Pt(NH3J3I ](N03)2—vide supra, platinosic salts. P. T. Cleve, and O. Carlgren and
P. T. Cleve obtained platinic dibromonitratotriamminoiodide, [Pt(NHg)3Br2(NO3) jl,
in yellowish-white needles, by gradually adding bromine to a hot soln. of platinum
diiodohexammine-/u,-diamidonitrate. K. Johansson, and O. Carlgren and P. T. Cleve
prepared platinum dinitratohexammino-/x-diimidosulphate, [(NO3) (N H3)3Pt (NH) 2-
Pt(NHg)3(NO3)JSO4, by the action of the theoretical proportion of silver nitrate
on the corresponding diiodo-sulphate—vide supra, the platinosic salts.
P. T. Cleve obtained platinicbromonitratotetramminosulphate, [Pt(NHg)4(NO3)-
Br]SO4.H2O, in small rhombic prisms and plates, by the action of cone, sulphuric
acid on hydroxybromotetramminonitrate ; and also platinic hydroxysulphatotetramminonitrate,
[Pt(NH3)4(OH)(SO4)JNO3, by treating the sulphate with the
theoretical proportion of barium nitrate. P. T. Cleve obtained platinous chloronitratotetramminosulphate,
[Pt(NHg)4(NO3)Cl]SO4, by the action of cone, sulphuric
acid on the hydroxychlorotetramminonitrate. The white prismatic crystals are
sparingly soluble in cold water, and freely soluble in hot water ; and an excess of
ammonium bromide forms dibromotetramminobromide. P. T. Cleve prepared
platinic carbonatonitratotetramminocarbonate, [Pt(NHg)4(NO3) (CO3) J2CO3, in
white prisms or scales, by boiling an aq. soln. of the hydroxynitratotetramminonitrate
with ammonium carbonate ; and platinic broniocarbonatotetraniniinocarbonate
dibromotetramminonitrate, [Pt(NH3)4(C08)Br]2C08.2[Pt(NH3)4Br2](N03)2, in eggyellow
needles, by mixing boiling soln. of the dibromotetramminonitrate with
sodium carbonate until the precipitate first formed redissolves, and cooling the
liquid filtered hot.