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Iron chloride


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, 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 (56)Fe35Cl
StateTeomegaeomegaexeomegaeyeBealphaegammaeDebetaereTrans.nu00
Diffuse absorption feature in the region 41700 - 42700 cm-1.
Brinton and Callear, 1974
C (4Pi) 1           (C lrarrow X1) R 31255.9 H
Mesnage, 1935; Miescher, 1938; Muller, 1943; Rao and Rao, 1969; Rao and Rao, 1971
C (4Pi)           (C lrarrow X1) R 31243.2 H
Mesnage, 1935; Miescher, 1938; Muller, 1943; Rao and Rao, 1969; Rao and Rao, 1971
           (C lrarrow X1) R 31221.2 H
Mesnage, 1935; Miescher, 1938; Muller, 1943; Rao and Rao, 1969; Rao and Rao, 1971
           (C lrarrow X1) R 31180.8 H
Mesnage, 1935; Miescher, 1938; Muller, 1943; Rao and Rao, 1969; Rao and Rao, 1971
StateTeomegaeomegaexeomegaeyeBealphaegammaeDebetaereTrans.nu00
B (6Pi) x2 + 29255.9 434.8 H 2.1        B lrarrow X2 V 29269.5 H
Miescher, 1938; Mesnage, 1939; missing citation
x2 + 29184          B lrarrow X2 V 29197.2 H
Miescher, 1938; Mesnage, 1939; missing citation
x2 + 29120          B lrarrow X2 V 29133.5 H
Miescher, 1938; Mesnage, 1939; missing citation
x2 + 29065          B lrarrow X2 V 29079.1 H
Miescher, 1938; Mesnage, 1939; missing citation
x2 + 29021          B lrarrow X2 V 29034.6 H
Miescher, 1938; Mesnage, 1939; missing citation
x2 + 28986          B lrarrow X2 V 28999.7 H
Miescher, 1938; Mesnage, 1939; missing citation
StateTeomegaeomegaexeomegaeyeBealphaegammaeDebetaereTrans.nu00
A (4Pi) x1 + 28016 (427.8) 2 H (1.2)        A lrarrow X1 V 28024.7 H
Muller, 1943; Rao and Rao, 1971
x1 + 27958 427.8 1.2        A lrarrow X1 V 27967.3 H
Muller, 1943; Rao and Rao, 1971
x1 + 27922 427.8 1.2        A lrarrow X1 V 27931.4 H
Muller, 1943; Rao and Rao, 1971
x1+27894 427.8 1.2        A lrarrow X1 V 27903.2 H
Muller, 1943; Rao and Rao, 1971
StateTeomegaeomegaexeomegaeyeBealphaegammaeDebetaereTrans.nu00
A' (4Pi) 3           A' rarrow X1 R 20549.3 H
Reddy and Rao, 1960
A' (4Pi)           A' rarrow X1 R 20484.5 H
Reddy and Rao, 1960
           A' rarrow X1 R 20429.0 H
Reddy and Rao, 1960
           A' rarrow X1 R 20378.0 H
Reddy and Rao, 1960
StateTeomegaeomegaexeomegaeyeBealphaegammaeDebetaereTrans.nu00
           V 17379
Reddy and Rao, 1960
           V (16486)
Mesnage, 1939; Reddy and Rao, 1960
           VR (15443)
Mesnage, 1939; Reddy and Rao, 1960; Rao, Rao, et al., 1970
X2 (6Sigma) x2 4 407.2 H 1.4         
StateTeomegaeomegaexeomegaeyeBealphaegammaeDebetaereTrans.nu00
X1 (4Sigma) x1 4 (409.9) 2 H (2.2)         

Notes

1Fragments of a complex system; DeltaG'(1/2) = 416 cm-1, DeltaG"(1/2) = 427 cm-1
2Vibrationa1 constants from Rao and Rao, 1971. An earlier analysis of A-X1 gave omegae'= 431.0, omegae'xe'= 2.9, omegae"= 397.0, omegae"xe"= 1.6 Muller, 1943.
3Complex system in the region 20000 - 21000 cm-1; omega' = 370 cm-1, omega" = 395 cm-1.
4It is not certain whether X1 or X2 is the ground state.

References

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.

Brinton and Callear, 1974
Brinton, R.K.; Callear, A.B., Chemical rearrangement in the reaction of Fe+ with SF6-. New spectra of iron halides, J. Chem. Soc. Faraday Trans. 2, 1974, 70, 203. [all data]

Mesnage, 1935
Mesnage, P., Sur les spectres d'emission moleculaires de quelques sels metalliques, Compt. Rend., 1935, 201, 389. [all data]

Miescher, 1938
Miescher, E., Helv. Phys. Acta, 1938, 11, 463. [all data]

Muller, 1943
Muller, W., Terme hoher multiplizitat in molekulspektren, Helv. Phys. Acta, 1943, 16, 3-32. [all data]

Rao and Rao, 1969
Rao, D.V.K.; Rao, P.T., High multiplicity electronic transitions in the spectrum of FeCl, Curr. Sci., 1969, 38, 87. [all data]

Rao and Rao, 1971
Rao, D.V.K.; Rao, P.T., Complex band spectrum of FeCl in the ultraviolet region, Indian J. Pure Appl. Phys., 1971, 9, 102. [all data]

Mesnage, 1939
Mesnage, P., Recherches sur les decharges de haute frequence et leur application a la spectroscopie moleculaire, Ann. Phys. (Paris), 1939, 12, 5. [all data]

Reddy and Rao, 1960
Reddy, S.P.; Rao, P.T., The spectrum of iron monochloride in the visible, J. Mol. Spectrosc., 1960, 4, 16. [all data]

Rao, Rao, et al., 1970
Rao, N.V.K.; Rao, D.V.K.; Rao, P.T., The spectrum of FeCl in the red, Curr. Sci., 1970, 39, 392. [all data]


Notes

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