Aluminum monochloride


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
Δfgas-12.30kcal/molReviewChase, 1998Data last reviewed in September, 1979
Quantity Value Units Method Reference Comment
gas,1 bar54.481cal/mol*KReviewChase, 1998Data last reviewed in September, 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 (cal/mol*K)
    H° = standard enthalpy (kcal/mol)
    S° = standard entropy (cal/mol*K)
    t = temperature (K) / 1000.

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Temperature (K) 298. to 6000.
A 8.798301
B 0.318413
C -0.105915
D 0.018027
E -0.054193
F -15.11820
G 64.73291
H -12.30000
ReferenceChase, 1998
Comment Data last reviewed in September, 1979

Constants of diatomic molecules

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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: 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 27Al35Cl
StateTeωeωexeωeyeBeαeγeDeβereTrans.ν00
Fragments of additional systems in the region 48200 - 54900 cm-1.
Reddy and Rao, 1957
b (3Σ) (43591) (350) 1   [0.226] 2     [2.21] b → a R 18847.40 HQ
missing citation
           R 18911 (Z)
missing citation
           R 19895.00 HQ
missing citation
StateTeωeωexeωeyeBeαeγeDeβereTrans.ν00
A 1Π 38254.0 449.96 HQ 4.37 3 -0.216 0.259 4 0.006    2.067 A ↔ X RV 38237.7 HQ
missing citation; Mahanti, 1934; missing citation; Miescher, 1935
a 3Πr 24658 524.35 HQ 2.175  0.250 5 0.002    2.10 a → X V 24680 (Z)
missing citation
24593.84 524.35 HQ 2.175  0.250 5 0.002    2.10 a → X V 24615.31 HQ
missing citation
24528 524.35 HQ 2.175  0.250 5 0.002    2.10 a → X V 24541.65 HP
missing citation
StateTeωeωexeωeyeBeαeγeDeβereTrans.ν00
X 1Σ+ 0 481.3 HQ 1.95  0.24393012 0.00161113 6  2.5027E-07 7 -0.0053E-7 2.130113 8 9  
Lide, 1965; Wyse and Gordy, 1972

Notes

1Estimated from observed isotope shifts.
2v > 0 probably predissociated.
3This state may have a potential hump of ~ 0.26 eV. Barrow, 1954, Barrow, 1960
4Predissociation in v=10 missing citation.
5Estimated from P and Q head separations.
6αv= +4.697E-6(v+1/2)2 - 5.7E-9(v+1/2)3.
7He= -4.456E-14.
8From the corrected Be = 0.24394229.
9Microwave sp. 11
10Thermochemical value [see Appendix of Hildenbrand and Theard, 1969] See also Barrow, 1960.
11μel = 1 to 2 D Lide, 1965. Values of eqQ in Lide, 1965, Hoeft, Torring, et al., 1973.

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.

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

Reddy and Rao, 1957
Reddy, S.P.; Rao, P.T., The emission spectrum of aluminum monochloride in the vacuum ultraviolet, Can. J. Phys., 1957, 35, 912. [all data]

Mahanti, 1934
Mahanti, P.C., Das bandenspektrum des aluminiumchlorids, Z. Phys., 1934, 88, 550. [all data]

Miescher, 1935
Miescher, E., Bandenspektren von bor- und aluminium-halogeniden, Helv. Phys. Acta, 1935, 8, 279. [all data]

Lide, 1965
Lide, D.R., Jr., High-temperature microwave spectroscopy: AlF and AlCl, J. Chem. Phys., 1965, 42, 1013. [all data]

Wyse and Gordy, 1972
Wyse, F.C.; Gordy, W., Millimeter wave rotational spectra of AlCl, AlBr, and AlI, J. Chem. Phys., 1972, 56, 2130. [all data]

Barrow, 1954
Barrow, R.F., Maxima in the potential energy-distance functions of diatomic molecules, J. Chem. Phys., 1954, 22, 573. [all data]

Barrow, 1960
Barrow, R.F., Dissociation energies of the gaseous monohalides of boron, aluminium, gallium, indium, and thallium, Trans. Faraday Soc., 1960, 56, 952. [all data]

Hildenbrand and Theard, 1969
Hildenbrand, D.L.; Theard, L.P., Mass spectrometric measurement of the dissociation energies of BeCi and BeCl2, J. Chem. Phys., 1969, 50, 5350. [all data]

Hoeft, Torring, et al., 1973
Hoeft, J.; Torring, T.; Tiemann, E., Hyperfeinstruktur von AlCl und AlBr, Z. Naturforsch. A, 1973, 28, 1066. [all data]


Notes

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