Dialuminum

• Formula: Al₂
• Molecular weight: 53.9630772
• IUPAC Standard InChI: InChI=1S/2Al Copy

  
• IUPAC Standard InChIKey: QSDQMOYYLXMEPS-UHFFFAOYSA-N Copy
• CAS Registry Number: 32752-94-6
• Chemical structure:
  This structure is also available as a 2d Mol file or as a computed 3d SD file
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• Information on this page:
  • Gas phase thermochemistry data
  • Gas phase ion energetics data
  • References
  • Notes
• Other data available:
  • Constants of diatomic molecules
• Data at other public NIST sites:
  • Gas Phase Kinetics Database
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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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Gas phase ion energetics 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 as indicated in comments:
LLK - Sharon G. Lias, Rhoda D. Levin, and Sherif A. Kafafi
B - John E. Bartmess

View reactions leading to Al₂⁺ (ion structure unspecified)

Electron affinity determinations

Ionization energy determinations

References

Go To: Top, Gas phase thermochemistry data, Gas phase ion energetics data, Notes

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

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

Li, Wu, et al., 1998
Li, X.; Wu, H.; Wang, X.; Wang, L., s-p Hybridization and Electron Shell Structures in Aluminum Clusters: A photoelectron Spectroscopy Study, Phys. Rev. Lett., 1998, 81, 9, 1909, https://doi.org/10.1103/PhysRevLett.81.1909 . [all data]

Cha, Ganteför, et al., 1994
Cha, C.-Y.; Ganteför, G.; Eberhardt, W., The Development of the 3p and 4p Valence Band of Small Aluminum and Gallium Clusters, J. Chem. Phys., 1994, 100, 2, 995, https://doi.org/10.1063/1.466582 . [all data]

Gantefoer, Gause, et al., 1988
Gantefoer, G.; Gause, G.; Meiwes-Broer, K.H.; Lutz, H.O., Photoelectron Spectroscopy of Jet-cooled Aluminium Cluster Anions, Z. Phys. D, 1988, 9, 3, 253, https://doi.org/10.1007/BF01438297 . [all data]

Stearns and Kohl, 1973
Stearns, C.A.; Kohl, F.J., Mass spectrometric determination of the dissociation energies of AlC₂, Al₂C₂, and AlAuC₂, J. Phys. Chem., 1973, 77, 136. [all data]

Stearns and Kohl, 1973, 2
Stearns, C.A.; Kohl, F.J., Mass spectrometric determination of the dissociation energies of gaseous Al₂, AlSi, and AlSiO, High Temp. Sci., 1973, 5, 113. [all data]

Notes

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• Symbols used in this document:
  

  EA	Electron affinity
  S°gas,1 bar	Entropy of gas at standard conditions (1 bar)
  ΔfH°gas	Enthalpy of formation of gas at standard conditions

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