5 P4O6 + 4 I2 → 4 P2I2 + 3 P4O10

This is an oxidation-reduction (redox) reaction:

8 PIII + 16 e- → 8 PI (reduction)

12 PIII - 24 e- → 12 PV (oxidation)

8 I0 + 8 e- → 8 I-I (reduction)

P4O6 is an oxidizing agent, P4O6 is a reducing agent, I2 is an oxidizing agent.

Reactants:

  • P4O6
    • Names: Phosphorus trioxide source: wikipedia, accessed: 2019-09-27, Phosphorus(III) oxide source: wikipedia, accessed: 2019-09-27, Phosphorus sesquioxide source: wikipedia, accessed: 2019-09-27
    • Appearance: Colourless monoclinic crystals or liquid source: wikipedia, accessed: 2019-09-27
  • I2
    • Names: Iodine source: ICSC, accessed: 2019-09-04source: NIOSH NPG, accessed: 2019-09-02, Jod source: ICSC, accessed: 2019-09-04, Iode source: ICSC, accessed: 2019-09-04
    • Appearance: Bluish black or dark purple crystals with pungent odour source: ICSC, accessed: 2019-09-04; Violet solid with a sharp, characteristic odor. source: NIOSH NPG, accessed: 2019-09-02

Products:

  • P2I2
  • P4O10
    • Names: Phosphorus pentoxide source: wikipedia, accessed: 2019-09-27source: ICSC, accessed: 2019-09-04, Diphosphorus pentoxide source: wikipedia, accessed: 2019-09-27source: ICSC, accessed: 2019-09-04, Phosphorus(V) oxide source: wikipedia, accessed: 2019-09-27
    • Appearance: White powder | very deliquescent | odorless source: wikipedia, accessed: 2019-09-27; Hygroscopic white crystals or powder source: ICSC, accessed: 2019-09-04