Nhr sentence example

nhr
  • Carbon bisulphide combines with primary amines to form alkyl dithiocarbamates, which when heated lose sulphuretted hydrogen and leave a residue of a dialkyl thio-urea, CS 2 +2R NH 2 - R NH CSS NH 3 RCS(NHR)2+H2S; or if the aqueous solution of the dithiocarbamate be boiled with mercuric chloride or silver nitrate solution, a mustard oil (q.v.) is formed, R.NH CSS NH3R+HgC12-Hg(R NH CSS)2->2RNCS-}-HgS+H2S.
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  • The structural relations of these compounds may be shown thus: NH 3; NH2R; Ammonia; primary amine; NHR 2; NR3; NR41.
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  • The aqueous solution of the amines is now shaken up with diethyl oxalate, when the primary amine forms a crystalline dialkyl oxamide and the secondary amine an insoluble liquid, which is an ethyl dialkyl oxamate, the tertiary amine not reacting: (C02C2H5)2+ 2NH 2 R = (CO�NHR) 2 -{- 2C 2 H S OH; (CO 2 C 2 H 5) 2 -}- NHR 2 = C 2 H S O 2 C�Conr 2 -1-C 2 H S Oh.
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  • With benzene sulphochloride in the presence of alkali, the primary amines yield compounds of the type C 6 H 5 S0 2 NHR, soluble in alkalies, whilst the secondary amines yield compounds of the type C 6 H 5 S0 2 NR 2, insoluble in alkalies (0.
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  • Diazo-Amines.-The diazo-amines, R N: N NHR I, are obtained by the action of primary amines on diazonium salts; by the action of nitrous acid on a free primary amine, an isodiazohydroxide being formed as an intermediate product which then condenses with the amine; and by the action of nitrosamines on primary amines.
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  • NHR, may be prepared by the action of the primary and secondary amines on the diazonium salts, or by the action of nitrous acid on the free primary amine.
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  • Alkyl ureas are formed by the action of primary or secondary amines on isocyanic acid or its esters: [[Conh+Nh2r= R Nhc0nh]] 2 i [[Conr+Nhr 2 =Nr 2 Co Nhr]]; by the action of carbonyl chloride on amines: COC12+2NHR2=C0(NR2)2+2HC1; and in the hydrolysis of many ureides.
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  • Hofmann, Ber., 1867, I, p. 27): [[Csnr+Nh 3 =Nh 2 Cs Nhr]]; [[Csnr+Nh2r=R Nh Cs Nhr]],.
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  • CS(NHR) 2 +NH 2 R+HgO--)HgS+RN :C (NHR)2.
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  • The aqueous solution of the amines is now shaken up with diethyl oxalate, when the primary amine forms a crystalline dialkyl oxamide and the secondary amine an insoluble liquid, which is an ethyl dialkyl oxamate, the tertiary amine not reacting: (C02C2H5)2+ 2NH 2 R = (CO�NHR) 2 -{- 2C 2 H S OH; (CO 2 C 2 H 5) 2 -}- NHR 2 = C 2 H S O 2 C�Conr 2 -1-C 2 H S Oh.
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  • The latter readily undergo the " Beckmann " transformation on treatment with acid chlorides, yielding substituted acid amides, RR' C:NOH -› RC(NR') OH - R CO NHR' (see OxIMES, also A.
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