Bromoimidogen


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
Δfgas300.76kJ/molReviewChase, 1998Data last reviewed in December, 1962
Quantity Value Units Method Reference Comment
gas,1 bar235.45J/mol*KReviewChase, 1998Data last reviewed in December, 1962

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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Temperature (K) 298. - 6000.
A 36.33143
B 1.375294
C -0.246115
D 0.020919
E -0.369142
F 288.6299
G 276.9377
H 300.7585
ReferenceChase, 1998
Comment Data last reviewed in December, 1962

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 May, 1977

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 14N79Br
StateTeωeωexeωeyeBeαeγeDeβereTrans.ν00
b 1Σ+ 14787.3 785.5 H 4.363  0.4733 1 0.0152    1.7306 b → X 2 V 14834.3 H
Elliott, 1939; missing citation
X 3Σ-(0+) 0 3 691.75 H 4.720  0.444 3 1 0.0040 3    1.787 4  
Milligan and Jacox, 1964

Notes

1Potential functions Singh and Rai, 1966.
2Franck-Condon factors Itagi, Shamkuwar, et al., 1971.
3Only levels with N = J+1, i.e. F1(N) corresponding in case "c" to the 0+ component, have been observed at high resolution. For this reason, and since only B"3 and B"7 have been determined (assuming λ ~8.7, γ ~-0.7) the values of Be and αe are not very precise.
4Vibration sp. 6
5Estimated from the highest v' value observed in b→X emission from the reaction N(4S) + Br(2P3/2) → NBr* → NBr + hv Milton, Dunford, et al., 1961.
6In argon and nitrogen matrices, ΔG(1/2) = 691.

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]

Elliott, 1939
Elliott, A., A band spectrum attributed to NBr, Proc. R. Soc. London A, 1939, 169, 469. [all data]

Milligan and Jacox, 1964
Milligan, D.E.; Jacox, M.E., Infrared Spectra of NF, NCl, and NBr, J. Chem. Phys., 1964, 40, 9, 2461, https://doi.org/10.1063/1.1725547 . [all data]

Singh and Rai, 1966
Singh, R.B.; Rai, D.K., Potential curves for some diatomic molecules: P2, PN, SiN, NBr, BaO, BeF, SiF & SnF, Indian J. Pure Appl. Phys., 1966, 4, 102. [all data]

Itagi, Shamkuwar, et al., 1971
Itagi, S.; Shamkuwar, N.R.; Itagi, V.V., Franck-Condon factors for bands of NBr 1Σ+-3Σ- system, Indian J. Phys., 1971, 45, 385. [all data]

Milton, Dunford, et al., 1961
Milton, E.R.V.; Dunford, H.B.; Douglas, A.E., Spectrum of NBr excited in active nitrogen, J. Chem. Phys., 1961, 35, 1202. [all data]


Notes

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