Home Symbol which looks like a small house Up Solid circle with an upward pointer in it


Constants of diatomic molecules

Go To: Top, 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 November, 1977

Symbols used in the table of constants
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 (130)Te2+
The following states are from the photoelectron spectrum Berkowitz, 1975 Streets and Berkowitz, 1976; the identifications of the peaks are tentative, no vibratioanl structure has been observed. There are additional peaks corresponding to higher ionization energies.
D (2Piu) 33230           
C (2Sigmag-) 28790           
B (2Piu) 26450           
b (4Sigmag-) 21940           
A (2Piu) 14520           
a (4Piu) 9030           
X (2Pig,r) 3790           


1A weighted mean Barrow and Du Parcq, 1972 of several values obtained by spectroscopic Jha and Rao, 1969, Barrow and Du Parcq, 1972 and thermochemical Budininkas, Edwards, et al., 1968, Smoes, Mandy, et al., 1972 methods and from a photoionization threshold Berkowitz and Chupka, 1969.
2By photoionization mass-spectrometry Berkowitz and Chupka, 1969, Guyon and Berkowitz, 1971. Similar values from the photoelectron spectrum Berkowitz, 1975, Streets and Berkowitz, 1976.
3Constants for the only observed vibrational level of this state, from laser-excited fluorescence spectra. The v numbering is unknown (probably 6 ~leq v' ~leq 10).
4The vibrational numbering adopted here was first suggested by Olsson, 1935 and has recently been confirmed by isotope studies Jha and Rao, 1969, Jha, Subbaram, et al., 1969, 107); v' has been increased by +3 units compared to the numbering used by Rosen, 1927, Herzberg, 1950, Prasad and Rao, 1955.
5for v ~< 20, see 6.
6Numerous local perturbations. A much stronger homogeneous perturbation affects levels with v ~geq 20 Jha and Rao, 1969, Jha, Subbaram, et al., 1969,107. Predissociation above v=23 Hirschlaff, 1932, Olsson, 1935, i.e. at ~ 25600 cm-1 above X1 0g+(v=0); induced predissociation below this limit Kondratjew and Lauris, 1934, Olsson, 1935, Olsson, 1937; accidental predissociation of the vibrational type Rosen, 1945.
7Rotational analyses of bands of 128Te2 Barrow and Du Parcq, 1972, extended by Yee and Barrow, 1972.
8Continuous emission with maximum at 19200 cm-1 has been interpreted as recombination continuum Rompe, 1936.
9Potentia1 curves Rao, Rao, et al., 1975.
10 Barrow and Du Parcq, 1972.
11From D00(Te2) + I.P.(Te) - I.P.(Te2).


Go To: Top, 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.

Berkowitz, 1975
Berkowitz, J., PES of high temperature vapors. VII. S2 and Te2, J. Chem. Phys., 1975, 62, 4074. [all data]

Streets and Berkowitz, 1976
Streets, D.G.; Berkowitz, J., Photoelectron spectroscopy of Se2 and Te2, J. Electron Spectrosc. Relat. Phenom., 1976, 9, 269. [all data]

Barrow and Du Parcq, 1972
Barrow, R.F.; Du Parcq, R.P., Rotational analysis of the A0u+, B0u+-X0g+ systems of gaseous Te2, Proc. R. Soc. London A, 1972, 327, 279. [all data]

Jha and Rao, 1969
Jha, B.L.; Rao, D.R., Emission spectrum of Te2, Chem. Phys. Lett., 1969, 3, 175. [all data]

Budininkas, Edwards, et al., 1968
Budininkas, P.; Edwards, R.K.; Wahlbeck, P.G., Dissociation energies of group VIa gaseous homonuclear diatomic molecules. III. Tellurium, J. Chem. Phys., 1968, 48, 2870. [all data]

Smoes, Mandy, et al., 1972
Smoes, S.; Mandy, F.; Vander Auwera-Mahieu, A.; Drowart, J., Determination by the mass spectrometric Knudsen cell method of the dissociation energies of the group IB chalcogenides, Bull. Soc. Chim. Belg., 1972, 81, 45. [all data]

Berkowitz and Chupka, 1969
Berkowitz, J.; Chupka, W.A., Photoionization of high-temperature vapors. VI. S2, Se2, and Te2, J. Chem. Phys., 1969, 50, 4245. [all data]

Guyon and Berkowitz, 1971
Guyon, P.M.; Berkowitz, J., Interpretation of photoionization threshold behavior, J. Chem. Phys., 1971, 54, 1814. [all data]

Olsson, 1935
Olsson, E., Das emissionsspektrum des Te2, Z. Phys., 1935, 95, 215. [all data]

Jha, Subbaram, et al., 1969
Jha, B.L.; Subbaram, K.V.; Rao, D.R., Electronic spectra of 130Te2 and 128Te2, J. Mol. Spectrosc., 1969, 32, 383. [all data]

Rosen, 1927
Rosen, B., Redsonanz-, fluoreszenz- und absorptionsspektra in der sechsten gruppe des periodischen systems, Z. Phys., 1927, 43, 69. [all data]

Herzberg, 1950
Herzberg, G., Molecular spectra and molecular structure. I. Spectra of diatomic molecules, Pub. D. Van Nostrand Company, Inc., Princeton, New Jersey, 1950, 0. [all data]

Prasad and Rao, 1955
Prasad, N.D.; Rao, P.T., The band spectrum of tellurium in the visible, Indian J. Phys., 1955, 28, 549. [all data]

Hirschlaff, 1932
Hirschlaff, E., Uber die absorptionsbanden von jod und von tellur, Z. Phys., 1932, 75, 315. [all data]

Kondratjew and Lauris, 1934
Kondratjew, V.; Lauris, A., Induzierte pradissoziation der Te2-molekule, Z. Phys., 1934, 92, 741. [all data]

Olsson, 1937
Olsson, E., La predissociation induite de la molecule de tellure soumise a des champs magnetiques intenses, Compt. Rend., 1937, 204, 1182. [all data]

Rosen, 1945
Rosen, B., Special cases of predissociation, Phys. Rev., 1945, 68, 124. [all data]

Yee and Barrow, 1972
Yee, K.K.; Barrow, R.F., Observations on the absorption and fluorescence spectra of gaseous Te2, J. Chem. Soc. Faraday Trans. 2, 1972, 68, 1397. [all data]

Rompe, 1936
Rompe, R., Einige untersuchungen uber die entladung in tellurdampf, Z. Phys., 1936, 101, 214. [all data]

Rao, Rao, et al., 1975
Rao, M.L.P.; Rao, D.V.K.; Rao, P.T., Dissociation energies of XOg+ and AOu+ states of gaseous Te2, Spectrosc. Lett., 1975, 8, 745. [all data]


Go To: Top, Constants of diatomic molecules, References