Phosphorus dimer

• Formula: P₂
• Molecular weight: 61.947524
• IUPAC Standard InChI: InChI=1S/P2/c1-2 Copy

  
• IUPAC Standard InChIKey: FOBPTJZYDGNHLR-UHFFFAOYSA-N Copy
• CAS Registry Number: 12185-09-0
• Chemical structure:
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• Information on this page:
  • Gas phase thermochemistry data
  • Reaction thermochemistry data
  • References
  • Notes
• Other data available:
  • Gas phase ion energetics data
  • Constants of diatomic molecules
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Gas phase thermochemistry data

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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Gas Phase Heat Capacity (Shomate Equation)

C_p° = A + B*t + C*t² + D*t³ + E/t²
H° − H°_298.15= A*t + B*t²/2 + C*t³/3 + D*t⁴/4 − E/t + F − H
S° = A*ln(t) + B*t + C*t²/2 + D*t³/3 − E/(2*t²) + G
    C_p = heat capacity (J/mol*K)
    H° = standard enthalpy (kJ/mol)
    S° = standard entropy (J/mol*K)
    t = temperature (K) / 1000.

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Reaction thermochemistry data

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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Data compiled by: John E. Bartmess

Note: Please consider using the reaction search for this species. This page allows searching of all reactions involving this species. A general reaction search form is also available. Future versions of this site may rely on reaction search pages in place of the enumerated reaction displays seen below.

Individual Reactions

(CAS Reg. No. 141171-05-3 • 4294967295) +  = CAS Reg. No. 141171-05-3

By formula: (CAS Reg. No. 141171-05-3 • 4294967295P₂) + P₂ = CAS Reg. No. 141171-05-3

(CAS Reg. No. 141171-04-2 • 4294967295) +  = CAS Reg. No. 141171-04-2

By formula: (CAS Reg. No. 141171-04-2 • 4294967295P₂) + P₂ = CAS Reg. No. 141171-04-2

References

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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Cox, Wagman, et al., 1984
Cox, J.D.; Wagman, D.D.; Medvedev, V.A., CODATA Key Values for Thermodynamics, Hemisphere Publishing Corp., New York, 1984, 1. [all data]

Chase, 1998
Chase, M.W., Jr., NIST-JANAF Themochemical Tables, Fourth Edition, J. Phys. Chem. Ref. Data, Monograph 9, 1998, 1-1951. [all data]

O'Hair, Krempp, et al., 1992
O'Hair, R.A.J.; Krempp, M.; Damrauer, R.; Depuy, C.H., Gas-Phase Ion Chemistry of HP2(-), FP2(-), and HP2(+), Inorg. Chem., 1992, 31, 11, 2092, https://doi.org/10.1021/ic00037a021 . [all data]

Notes

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• Symbols used in this document:
  

  S°gas,1 bar	Entropy of gas at standard conditions (1 bar)
  ΔfH°gas	Enthalpy of formation of gas at standard conditions
  ΔrH°	Enthalpy of reaction at standard conditions

• Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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