Formic acid anhydride

Formula: C₂H₂O₃
Molecular weight: 74.0355
CAS Registry Number: 1558-67-4
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Other data available:
- Gas phase thermochemistry data
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Vibrational and/or electronic energy levels

State: X

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


a'	1	CH stretch	2987	w	Ar	IR	Kuhne, Ha, et al., 1979
	2	CH stretch	2967	w	Ar	IR	Kuhne, Ha, et al., 1979
	3	C=O stretch	1822	w m	gas	IR	Niki, Maker, et al., 1981
	3	C=O stretch	1812	m	Ar	IR	Kuhne, Ha, et al., 1979 Hawkins, Kohlmiller, et al., 1982
	4	C=O stretch	1767	s	gas	IR	Niki, Maker, et al., 1981
	4	C=O stretch	1762	s	Ar	IR	Kuhne, Ha, et al., 1979 Hawkins, Kohlmiller, et al., 1982
	5	H deformation	1381	w	Ar	IR	Kuhne, Ha, et al., 1979
	6	H deformation	1359	w	Ar	IR	Kuhne, Ha, et al., 1979
	7	(Mixed)	1105	s	gas	IR	Niki, Maker, et al., 1981
	7	(Mixed)	1090	s	Ar	IR	Kuhne, Ha, et al., 1979 Hawkins, Kohlmiller, et al., 1982
	8	C-O stretch	998	m	gas	IR	Niki, Maker, et al., 1981
	8	C-O stretch	998	m	Ar	IR	Kuhne, Ha, et al., 1979 Hawkins, Kohlmiller, et al., 1982
	9	C-O stretch	776	w	Ar	IR	Kuhne, Ha, et al., 1979
	10	O-C=O bend	540	w	Ar	IR	Kuhne, Ha, et al., 1979 Hawkins, Kohlmiller, et al., 1982
	11	C-O-C bend	260	w	Ar	IR	Kuhne, Ha, et al., 1979
a	12	H deformation	1067	w	Ar	IR	Kuhne, Ha, et al., 1979
	14	Torsion	227	m	Ar	IR	Kuhne, Ha, et al., 1979

Additional references: Jacox, 1994, page 368; Vaccani, Roos, et al., 1977

Notes

Weak

Medium

Strong

References

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Kuhne, Ha, et al., 1979
Kuhne, H.; Ha, T.-K.; Meyer, R.; Gunthard, H.H., Formic acid anhydride, J. Mol. Spectrosc., 1979, 77, 2, 251, https://doi.org/10.1016/0022-2852(79)90107-3 . [all data]

Niki, Maker, et al., 1981
Niki, H.; Maker, P.D.; Savage, C.M.; Breitenbach, L.P., A FT IR study of a transitory product in the gas-phase ozone-ethylene reaction, J. Phys. Chem., 1981, 85, 8, 1024, https://doi.org/10.1021/j150608a020 . [all data]

Hawkins, Kohlmiller, et al., 1982
Hawkins, M.; Kohlmiller, C.K.; Andrews, L., Matrix infrared spectra and photolysis and pyrolysis of isotopic secondary ozonides of ethylene, J. Phys. Chem., 1982, 86, 16, 3154, https://doi.org/10.1021/j100213a019 . [all data]

Jacox, 1994
Jacox, M.E., Vibrational and electronic energy levels of polyatomic transient molecules, American Chemical Society, Washington, DC, 1994, 464. [all data]

Vaccani, Roos, et al., 1977
Vaccani, S.; Roos, U.; Bauder, A.; Gunthard, H.H., Microwave spectra, substitution structure and vibrational satellites of formic anhydride, Chem. Phys., 1977, 19, 1, 51, https://doi.org/10.1016/0301-0104(77)80006-2 . [all data]

Notes

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Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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