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phosphonium

phosphonium

phosphonium Sentence Examples

  • Fischer (Berichte, 1897, 30, p. 2238) by heating 2.6.8-trichlorpurin with 10 times its weight of ammonia for six hours at 100° C.; by this means 6-amino-2.8-dichlorpurin is obtained, which on reduction by means of hydriodic acid and phosphonium iodide is converted into adenine.

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  • Phosphonium Salts.-The chloride, PH 4 C1, was obtained as a crystalline solid by Ogier (Comptes rendus, 1879, 89, p. 705) by combining phosphine and hydrochloric acid gas under a pressure of from 14-20 atmospheres; it can also be obtained at -30° to -35° C. under ordinary atmospheric pressure.

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  • Just as the amines are derived from ammonia, so from phosphine are derived the primary, secondary and tertiary organic phosphines by the exchange of hydrogen for alkyl groups, and corresponding to the phosphonium salts there exists a series of organic phosphonium bases.

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  • The quaternary phosphonium salts resemble the corresponding nitrogen compounds.

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  • They are stable towards aqueous alkalis, but on digestion with moist silver oxide yield the phosphonium hydroxides, which are stronger bases than the caustic alkalis.

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  • The oxide P 2 0 was obtained by Besson (Comptes rendus, 1897, 124, p. 763; 1901, pp. 132, 1556) by heating a mixture of phosphonium bromide and phosphorus oxychoride in sealed tubes to 50°.

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  • The a-tetrahydronaphthalene is formed when naphthalene is heated with phosphonium iodide at 170°-190° (A.

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  • Fischer (Berichte, 1897, 30, p. 2238) by heating 2.6.8-trichlorpurin with 10 times its weight of ammonia for six hours at 100° C.; by this means 6-amino-2.8-dichlorpurin is obtained, which on reduction by means of hydriodic acid and phosphonium iodide is converted into adenine.

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  • The pure gas may also be obtained by heating phosphonium iodide with caustic potash (A.

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  • PH3.2BF31 2PH 3 =S1C1 4 (Besson, Comptes rendus, 1890, Ito, 80, pp. 240, 516; 1891, 113, p. 78), with the halogen acids to form phosphonium salts, PH 4 X (X=C1,Br,I), and with sodammonium and potassammonium to form PH 2 Na, PH 2 K (Joannis, Comptes rendus, 189x, 9, 557).

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  • Phosphonium Salts.-The chloride, PH 4 C1, was obtained as a crystalline solid by Ogier (Comptes rendus, 1879, 89, p. 705) by combining phosphine and hydrochloric acid gas under a pressure of from 14-20 atmospheres; it can also be obtained at -30° to -35° C. under ordinary atmospheric pressure.

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  • Just as the amines are derived from ammonia, so from phosphine are derived the primary, secondary and tertiary organic phosphines by the exchange of hydrogen for alkyl groups, and corresponding to the phosphonium salts there exists a series of organic phosphonium bases.

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  • The primary and secondary phosphines are produced when the alkyl iodides are heated with phosphonium iodide and zinc oxide to 150° C. (A.

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  • Thenard (Comptes rendus, 45, P 44; 47, 5, 892), are formed (together with the quaternary phosphonium salts) by heating alkyl iodides with phosphonium iodide to 150-180° C.: PH 4 I+3CH 3 I = P(CH3)3HI + 3HI; P(CH 3) 3 HI + CH 3 I = P(CH 3) 4 I + HI (see also Fireman, Ber., 1897, 30, p. 1088).

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  • The quaternary phosphonium salts resemble the corresponding nitrogen compounds.

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  • They are stable towards aqueous alkalis, but on digestion with moist silver oxide yield the phosphonium hydroxides, which are stronger bases than the caustic alkalis.

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  • The oxide P 2 0 was obtained by Besson (Comptes rendus, 1897, 124, p. 763; 1901, pp. 132, 1556) by heating a mixture of phosphonium bromide and phosphorus oxychoride in sealed tubes to 50°.

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  • C 2; CH 2 CH 2 Br H2.cH2 by the action of hydriodic acid and phosphorus or of phosphonium iodide on benzene hydrocarbons (F.

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