O2CCO2-

Formula: C₂O₄^-
Molecular weight: 88.0195
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Vibrational and/or electronic energy levels

State: ?

Energy (cm^-1)		Med.	References


T_xx_d = 20170	T	gas	Coe, 1986
			DeLuca, Niu, et al., 1988
			Tsukuda, Johnson, et al., 1997

State: X

Vib. sym.	No.	Approximate type of mode	cm^-1		Med.	Method	References


b₂	5	CO₂ s-stretch	1189.2		Ne	IR	Godbout, Halasinski, et al., 1996 Zhou and Andrews, 1999 Thompson and Jacox, 1999
	5	CO₂ s-stretch	1184.7		Ar	IR	Zhou and Andrews, 1999, 2
	6	Deformation	679.2	T	Ne	IR	Zhou and Andrews, 1999 Thompson and Jacox, 1999
e	7	CO₂ a-stretch	1852.4		Ne	IR	Godbout, Halasinski, et al., 1996 Zhou and Andrews, 1999 Thompson and Jacox, 1999
	7	CO₂ a-stretch	1856.7		Ar	IR	Zhou and Andrews, 1999, 2

Additional references: Jacox, 2003, page 330

Notes

Tentative assignment or approximate value

Energy separation between the band maxima of both the excited state and the ground state of a molecular cation, derived from a photoelectron spectrum.

Photodissociation threshold

References

Go To: Top, Vibrational and/or electronic energy levels, Notes

Coe, 1986
Coe, J.V., Ph.D. thesis, 1986, Johns Hopkins University, Baltimore, MD. [all data]

DeLuca, Niu, et al., 1988
DeLuca, M.J.; Niu, B.; Johnson, M.A., Photoelectron Spectroscopy of (CO₂)_n^- Clusters with 2=n=13: Cluster Size Dependence of the Core Molecular Ion, J. Chem. Phys., 1988, 88, 9, 5857, https://doi.org/10.1063/1.454548 . [all data]

Tsukuda, Johnson, et al., 1997
Tsukuda, T.; Johnson, M.A.; Nagata, T., Photoelectron spectroscopy of (CO2)n- revisited: core switching in the 2 ≤ n ≤ 16 range, Chem. Phys. Lett., 1997, 268, 5-6, 429, https://doi.org/10.1016/S0009-2614(97)00223-6 . [all data]

Godbout, Halasinski, et al., 1996
Godbout, J.T.; Halasinski, T.M.; Leroi, G.E.; Allison, J., Matrix Isolation of Mass-Selected Cations: Are Counterions Present and How Are They Formed?, J. Phys. Chem., 1996, 100, 8, 2892, https://doi.org/10.1021/jp952482k . [all data]

Zhou and Andrews, 1999
Zhou, M.; Andrews, L., Infrared spectra of the C[sub 2]O[sub 4][sup +] cation and C[sub 2]O[sub 4][sup -] anion isolated in solid neon, J. Chem. Phys., 1999, 110, 14, 6820, https://doi.org/10.1063/1.478586 . [all data]

Thompson and Jacox, 1999
Thompson, W.E.; Jacox, M.E., The vibrational spectra of CO[sub 2][sup +], (CO[sub 2])[sub 2][sup +], CO[sub 2][sup -], and (CO[sub 2])[sub 2][sup -] trapped in solid neon, J. Chem. Phys., 1999, 111, 10, 4487, https://doi.org/10.1063/1.479212 . [all data]

Zhou and Andrews, 1999, 2
Zhou, M.; Andrews, L., Infrared spectra of the CO[sub 2][sup -] and C[sub 2]O[sub 4][sup -] anions isolated in solid argon, J. Chem. Phys., 1999, 110, 5, 2414, https://doi.org/10.1063/1.477947 . [all data]

Jacox, 2003
Jacox, M.E., Vibrational and electronic energy levels of polyatomic transient molecules: supplement B, J. Phys. Chem. Ref. Data, 2003, 32, 1, 1-441, https://doi.org/10.1063/1.1497629 . [all data]

Notes

Go To: Top, Vibrational and/or electronic energy levels, References

Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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