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Dialuminum


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.

Quantity Value Units Method Reference Comment
Deltafgas487.02kJ/molReviewChase, 1998Data last reviewed in June, 1979
Quantity Value Units Method Reference Comment
gas,1 bar233.49J/mol*KReviewChase, 1998Data last reviewed in June, 1979

Gas Phase Heat Capacity (Shomate Equation)

Cp° = 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
    Cp = heat capacity (J/mol*K)
    H° = standard enthalpy (kJ/mol)
    S° = standard entropy (J/mol*K)
    t = temperature (K) / 1000.

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View table.

Temperature (K) 298. - 1400.1400. - 6000.
A 44.5085636.79740
B 7.1323390.736635
C -15.698580.293771
D 6.284242-0.023379
E -0.6213414.461483
F 471.4573483.5867
G 282.3715285.3103
H 487.0176487.0176
ReferenceChase, 1998Chase, 1998
Comment Data last reviewed in June, 1979 Data last reviewed in June, 1979

Gas phase ion energetics data

Go To: Top, Gas phase thermochemistry data, Constants of diatomic molecules, References, Notes

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

EA (eV) Method Reference Comment
1.460 ± 0.060LPESLi, Wu, et al., 1998B
1.60 ± 0.10LPESCha, Ganteför, et al., 1994Stated electron affinity is the Vertical Detachment Energy; B
<1.10 ± 0.15LPESGantefoer, Gause, et al., 1988Vertical Detachment Energy: same as EA; B

Ionization energy determinations

IE (eV) Method Reference Comment
5.4 ± 1.0EIStearns and Kohl, 1973LLK
5.4 ± 1.0EIStearns and Kohl, 1973, 2LLK

Constants of diatomic molecules

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

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

Data compiled by: Klaus P. Huber and Gerhard H. Herzberg

Data collected through November, 1975

Symbols used in the table of constants
SymbolMeaning
State electronic state and / or symmetry symbol
Te minimum electronic energy (cm-1)
ωe vibrational constant – first term (cm-1)
ωexe vibrational constant – second term (cm-1)
ωeye vibrational constant – third term (cm-1)
Be rotational constant in equilibrium position (cm-1)
αe rotational constant – first term (cm-1)
γe rotation-vibration interaction constant (cm-1)
De centrifugal distortion constant (cm-1)
βe rotational constant – first term, centrifugal force (cm-1)
re internuclear distance (Å)
Trans. observed transition(s) corresponding to electronic state
ν00 position of 0-0 band (units noted in table)
Diatomic constants for 27Al2
StateTeomegaeomegaexeomegaeyeBealphaegammaeDebetaereTrans.nu00
A 3Sigmau- 17269.36 278.8 1 H 0.831 -0.0104 0.1907 0.0013  3.9E-7  2.560 A rarrow X R 17234.05 H
missing citation; missing citation
X 3Sigmag- 0 350.01 1 H 2.022 -0.0105 0.2054 0.0012  3.07E-7  2.466  

Notes

1From Zeeman, 1954 who wrongly attributed the spectrum to AlC.
2Thermochemical value (mass spectrom.) Stearns and Kohl, 1973, 2. Values in Blue and Gingerich, 1968, Uy and Drowart, 1971 are somewhat higher.

References

Go To: Top, Gas phase thermochemistry data, Gas phase ion energetics data, Constants of diatomic molecules, 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]

Zeeman, 1954
Zeeman, P.B., Spectrum of the AlC molecule, Can. J. Phys., 1954, 32, 9. [all data]

Blue and Gingerich, 1968
Blue; Gingerich, 16th Annual Conference on Mass Spectrometry and Allied Topics - Paper 129, Pittsburgh, 1968, 0. [all data]

Uy and Drowart, 1971
Uy, O.M.; Drowart, J., Determination by the mass spectrometric Knudsen cell method of the atomization energies of the gaseous aluminium chalcogenides, Al2, AlCu, AlCuS, and AlCuS2, Trans. Faraday Soc., 1971, 67, 1293. [all data]


Notes

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