Formic acid
- Formula: CH2O2
- Molecular weight: 46.0254
- IUPAC Standard InChI: InChI=1S/CH2O2/c2-1-3/h1H,(H,2,3)
- IUPAC Standard InChIKey: BDAGIHXWWSANSR-UHFFFAOYSA-N
- CAS Registry Number: 64-18-6
- Chemical structure:
This structure is also available as a 2d Mol file or as a computed 3d SD file
The 3d structure may be viewed using Java or Javascript. - Other names: Methanoic acid; Aminic acid; Bilorin; Collo-Bueglatt; Collo-Didax; Formisoton; Formylic acid; Hydrogen carboxylic acid; Myrmicyl; HCOOH; Acide formique; Acido formico; Ameisensaeure; Kwas metaniowy; Kyselina mravenci; Mierenzuur; Rcra waste number U123; UN 1779; Formira; Add-F; Amasil
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Vibrational and/or electronic energy levels
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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: Takehiko Shimanouchi
Symmetry: Cs Symmetry Number σ = 1
| Sym. | No | Approximate | Selected Freq. | Infrared | Raman | Comments | ||||
|---|---|---|---|---|---|---|---|---|---|---|
| Species | type of mode | Value | Rating | Value | Phase | Value | Phase | |||
| a' | 1 | OH str | 3570 | D | 3570 M | gas | ||||
| a' | 2 | CH str | 2943 | C | 2942.8 M | gas | ||||
| a' | 3 | C=O str | 1770 | C | 1770 VS | gas | ||||
| a' | 4 | CH bend | 1387 | C | 1387 VW | gas | ||||
| a' | 5 | OH bend | 1229 | C | 1229 W | gas | ||||
| a' | 6 | C-O str | 1105 | C | 1105.3 S | gas | ||||
| a' | 7 | OCO deform | 625 | C | 625 M | gas | ||||
| a | 8 | CH bend | 1033 | C | 1033 W | gas | ||||
| a | 9 | Torsion | 638 | C | 638 S | gas | ||||
Source: Shimanouchi, 1972
Notes
| VS | Very strong |
| S | Strong |
| M | Medium |
| W | Weak |
| VW | Very weak |
| C | 3~6 cm-1 uncertainty |
| D | 6~15 cm-1 uncertainty |
References
Go To: Top, Vibrational and/or electronic energy levels, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Shimanouchi, 1972
Shimanouchi, T.,
Tables of Molecular Vibrational Frequencies Consolidated Volume I, National Bureau of Standards, 1972, 1-160. [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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