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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
Deltafgas300.76kJ/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
StateTeomegaeomegaexeomegaeyeBealphaegammaeDebetaereTrans.nu00
b 1Sigma+ 14787.3 785.5 H 4.363  0.4733 1 0.0152    1.7306 b rarrow X 2 V 14834.3 H
Elliott, 1939; missing citation
X 3Sigma-(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 lambda ~8.7, gamma ~-0.7) the values of Be and alphae are not very precise.
4Vibration sp. 6
5Estimated from the highest v' value observed in brarrowX emission from the reaction N(4S) + Br(2P3/2) rarrow NBr* rarrow NBr + hv Milton, Dunford, et al., 1961.
6In argon and nitrogen matrices, DeltaG(1/2) = 691.

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]

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 1«SIGMA»+-3«SIGMA»- 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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