Diphosphorus is an inorganic chemical with the chemical formula P 2. Unlike its nitrogen group neighbor nitrogen, which forms a stable N2 molecule with a nitrogen to nitrogen triple bond, phosphorus prefers a tetrahedral form P4 because P-P pi-bonds are high in energy. Diphosphorus is, therefore, very reactive with a bond-dissociation energy (117 kcal/mol or 490 kJ/mol) half that of dinitrogen. The bond distance has been measured at 1.8934 Å.

CAS：12185-09-0
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分子式：P2
分子量：61.9475
精确质量：61.9475
Psa：0.0
Logp：1.7224