Beryllium bromide


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
Δfgas28.707kcal/molReviewChase, 1998Data last reviewed in June, 1975
Quantity Value Units Method Reference Comment
gas,1 bar54.613cal/mol*KReviewChase, 1998Data last reviewed in June, 1975

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 8.616791
B 0.427515
C -0.108939
D 0.012844
E -0.087248
F 25.82739
G 64.42720
H 28.70700
ReferenceChase, 1998
Comment Data last reviewed in June, 1975

Constants of diatomic molecules

Go To: Top, Gas phase thermochemistry 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 April, 1976

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 9Be(79)Br
StateTeωeωexeωeyeBeαeγeDeβereTrans.ν00
A 2Πr 26554 1 695 H 5.2  [0.5332] 2   [0.00000131]  [1.9763] A → X R 26543.3 H
Reddy and Rao, 1968; missing citation; missing citation
26353 1 702 H 4.4  [0.5332] 2   [0.00000131]  [1.9763] A → X R 26346.1 H
Reddy and Rao, 1968; missing citation; missing citation
X 2Σ+ 0 715 H 3.8  [0.5459] 2   [0.00000131]  [1.953]  

Notes

1A0=+l98.0.
2Λ-type doubling in 2Π1/2, Δνef(v=0) = (+)0.030(J+1/2); details in Carleer, Herman, et al., 1975.
3Spin-splitting constant γ0 = +0.0242.

References

Go To: Top, Gas phase thermochemistry 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]

Reddy and Rao, 1968
Reddy, Y.P.; Rao, P.T., The emission spectrum of the BeBr molecule excited in the presence of argon, J. Phys. B:, 1968, 1, 482. [all data]

Carleer, Herman, et al., 1975
Carleer, M.; Herman, M.; Colin, R., Rotational analysis of the A2Π-X2Σ+ band system of the BeBr molecule, Can. J. Phys., 1975, 53, 1321. [all data]


Notes

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