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Properties of substance:

diphosphorus tetraiodide

Group of substances:

inorganic

Physical appearance:

orange triclinic crystals

Empirical formula (Hill's system for organic substances):

I4P2

Structural formula as text:

P2I4

Molar/atomic mass: 569.57

Melting point (°C):

126

Solubility (g/100 g of solvent):

carbon disulphide: soluble [Ref.]
water: reaction [Ref.]

Reactions:

  1. The preparation of phosphonium iodide is usually effected by the hydrolysis of an intimate mixture of diphosphorus tetraiodide and white phosphorus. [Ref.1aster, Ref.2aster]
    10P2I4 + 13P4 + 128H2O → 40PH4I + 32H3PO4

Standard molar enthalpy (heat) of formation ΔfH0 (298.15 K, kJ/mol):

-82.8 (s)

References:

  1. Ефимов А.И. и др. Свойства неорганических соединений. Справочник. - Л.: Химия, 1983. - pp. 208-209 [Russian]
  2. Некрасов Б.В. Основы общей химии. - Т.1. - М.: Химия, 1973. - pp. 455 [Russian]

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    © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru