Magnesium bromide


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 March, 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 24Mg(79)Br
StateTeωeωexeωeyeBeαeγeDeβereTrans.ν00
R shaded bands in the region 36800 - 39400 cm-1 have been variously attributed to a 2Π ← X 2Σ transition Harrington, 1942 or to a 2Σ ← X 2Σ Reddy and Rao, 1970; ω'e ~ 223 or 272 cm-1 respectively.
A 2Π 25877 393.9 H 2.04  [(0.1685)] 1 2     [(2.332)] A ↔ X V 25887 H
Olmsted, 1906; Morgan, 1936; Harrington, 1942; Puri and Mohan, 1974
25766.9 393.9 H 2.04  [(0.1685)] 1 2     [(2.332)] A ↔ X V 25776.8 H
Olmsted, 1906; Morgan, 1936; Harrington, 1942; Puri and Mohan, 1974
X 2Σ+ 0 373.8 H 1.34  [(0.1645)] 1     [(2.360)]  

Notes

1Partial rotational analysis of the 0-0 band Patel and Patel, 1969.
2Predissociation above v=3.
3From the predissociation in A 2Π.

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.

Harrington, 1942
Harrington, Dissertation, University of California, California, 1942, 0. [all data]

Reddy and Rao, 1970
Reddy, B.R.K.; Rao, P.T., The electronic emission spectrum of the MgBr molecule, Curr. Sci., 1970, 39, 509. [all data]

Olmsted, 1906
Olmsted, C.M., Die bandenspektra nahe verwandter verbindungen, Z. Wiss. Photogr. Photophys. Photochem., 1906, 4, 293-333. [all data]

Morgan, 1936
Morgan, F., Band spectra of MgCl, MgBr and MgI in absorption, Phys. Rev., 1936, 50, 603. [all data]

Puri and Mohan, 1974
Puri, S.N.; Mohan, H., Thermal emission spectrum of the molecule - MgBr, Curr. Sci., 1974, 43, 442. [all data]

Patel and Patel, 1969
Patel, M.M.; Patel, P.D., Rotational analysis of the (0,0) bands of the A2Π → X2Σ+ system of MgBr, J. Phys. B:, 1969, 2, 515. [all data]


Notes

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