Boric acid
- Formula: BH3O3
- Molecular weight: 61.833
- IUPAC Standard InChI: InChI=1S/BH3O3/c2-1(3)4/h2-4H
- IUPAC Standard InChIKey: KGBXLFKZBHKPEV-UHFFFAOYSA-N
- CAS Registry Number: 10043-35-3
- Chemical structure:
This structure is also available as a 2d Mol file or as a computed 3d SD file
View 3d structure (requires JavaScript / HTML 5) - Other names: Orthoboric acid; H3-BO3; Boracic acid; Boric acid (BH3O3); Boric acid (H3BO3); Borofax; Boron hydroxide; Boron trihydroxide; NCI-C56417; Orthoboric acid (B(OH)3); Borsaure; Three elephant; Ant flip; Homberg's salt; B(OH)3; Basilit B; Dr.'s 1 Flea Terminator DF; Dr.'s 1 Flea Terminator DFPBO; Dr.'s 1 Flea Terminator DT; Dr.'s 1 Flea Terminator DTPBO; Flea Prufe; NSC 81726; Super Flea Eliminator; Trihydroxyborane; Acidum boricum (Salt/Mix); Bluboro (Salt/Mix); Collyrium Eye Wash (Salt/Mix); Collyrium Fresh-Eye Drops (Salt/Mix); component of Aci-Jel (Salt/Mix)
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Gas phase thermochemistry data
Go To: Top, Gas phase ion energetics data, Vibrational and/or electronic energy levels, References, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔfH°gas | -992.28 | kJ/mol | Review | Chase, 1998 | Data last reviewed in December, 1964 |
| Quantity | Value | Units | Method | Reference | Comment |
| S°gas,1 bar | 295.23 | J/mol*K | Review | Chase, 1998 | Data last reviewed in December, 1964 |
Gas Phase Heat Capacity (Shomate Equation)
Cp° = A + B*t + C*t2 + D*t3 +
E/t2
H° − H°298.15= A*t + B*t2/2 +
C*t3/3 + D*t4/4 − E/t + F − H
S° = A*ln(t) + B*t + C*t2/2 + D*t3/3 −
E/(2*t2) + G
Cp = heat capacity (J/mol*K)
H° = standard enthalpy (kJ/mol)
S° = standard entropy (J/mol*K)
t = temperature (K) / 1000.
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| Temperature (K) | 298. to 1200. | 1200. to 6000. |
|---|---|---|
| A | 22.91803 | 123.6309 |
| B | 182.0312 | 11.27103 |
| C | -125.7518 | -2.150124 |
| D | 34.68749 | 0.142479 |
| E | -0.145463 | -20.84674 |
| F | -1006.649 | -1075.104 |
| G | 273.1524 | 383.4117 |
| H | -992.2774 | -992.2774 |
| Reference | Chase, 1998 | Chase, 1998 |
| Comment | Data last reviewed in December, 1964 | Data last reviewed in December, 1964 |
Gas phase ion energetics data
Go To: Top, Gas phase thermochemistry data, Vibrational and/or electronic energy levels, References, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Data evaluated by: Edward P. Hunter and Sharon G. Lias
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| Proton affinity (review) | 728.1 | kJ/mol | N/A | Hunter and Lias, 1998 | |
| Quantity | Value | Units | Method | Reference | Comment |
| Gas basicity | 698.4 | kJ/mol | N/A | Hunter and Lias, 1998 |
Vibrational and/or electronic energy levels
Go To: Top, Gas phase thermochemistry data, Gas phase ion energetics data, 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: Marilyn E. Jacox
State: X
| Vib. sym. |
No. | Approximate type of mode |
cm-1 | Med. | Method | References | |
|---|---|---|---|---|---|---|---|
| a' | 1 | OH stretch | 3705 | gas | Ra | Gilson, 1991 | |
| 2 | BOH deform. | 1020 | gas | Ra | Gilson, 1991 | ||
| 3 | BO stretch | 866 | gas | Ra | Gilson, 1991 | ||
| a | 4 | BO3 OPLA | 666.4 | Ar | IR | Andrews and Burkholder, 1992 | |
| 4 | BO3 OPLA | 675.0 | N2 | IR | Ogden and Young, 1988 | ||
| 5 | Torsion | 436.0 | Ar | IR | Andrews and Burkholder, 1992 | ||
| 5 | Torsion | 513.8 | N2 | IR | Ogden and Young, 1988 | ||
| e' | 6 | OH stretch | 3706 | gas | IR | Gilson, 1991 | |
| 6 | OH stretch | 3688.6 | Ar | IR | Andrews and Burkholder, 1992 | ||
| 6 | OH stretch | 3668.5 | N2 | IR | Ogden and Young, 1988 | ||
| 7 | BO stretch | 1429 | gas | IR | Gilson, 1991 | ||
| 7 | BO stretch | 1414.9 | Ar | IR | Andrews and Burkholder, 1992 | ||
| 7 | BO stretch | 1426.2 | N2 | IR | Ogden and Young, 1988 | ||
| 8 | HOB deform. | 1017 | gas | IR | Gilson, 1991 | ||
| 8 | HOB deform. | 992.4 | Ar | IR | Andrews and Burkholder, 1992 | ||
| 8 | HOB deform. | 1009.9 | N2 | IR | Ogden and Young, 1988 | ||
| 9 | BO2 deform. | 432.1 | Ar | IR | Andrews and Burkholder, 1992 | ||
| 9 | BO2 deform. | 448.9 | N2 | IR | Ogden and Young, 1988 | ||
| e | 10 | HOB deform. | 520 ± 5 | Ar | IR | Andrews and Burkholder, 1992 | |
Additional references: Jacox, 1998, page 326
References
Go To: Top, Gas phase thermochemistry data, Gas phase ion energetics data, 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.
Chase, 1998
Chase, M.W., Jr.,
NIST-JANAF Themochemical Tables, Fourth Edition,
J. Phys. Chem. Ref. Data, Monograph 9, 1998, 1-1951. [all data]
Hunter and Lias, 1998
Hunter, E.P.; Lias, S.G.,
Evaluated Gas Phase Basicities and Proton Affinities of Molecules: An Update,
J. Phys. Chem. Ref. Data, 1998, 27, 3, 413-656, https://doi.org/10.1063/1.556018
. [all data]
Gilson, 1991
Gilson, T.R.,
J. Chem. Soc., 1991, Dalton Trans. 2463. [all data]
Andrews and Burkholder, 1992
Andrews, L.; Burkholder, T.R.,
Infrared spectra of molecular B(OH)3 and HOBO in solid argon,
J. Chem. Phys., 1992, 97, 10, 7203, https://doi.org/10.1063/1.463545
. [all data]
Ogden and Young, 1988
Ogden, J.S.; Young, N.A.,
J. Chem. Soc., 1988, Dalton Trans. 1645. [all data]
Jacox, 1998
Jacox, M.E.,
Vibrational and electronic energy levels of polyatomic transient molecules: supplement A,
J. Phys. Chem. Ref. Data, 1998, 27, 2, 115-393, https://doi.org/10.1063/1.556017
. [all data]
Notes
Go To: Top, Gas phase thermochemistry data, Gas phase ion energetics data, Vibrational and/or electronic energy levels, References
- Symbols used in this document:
S°gas,1 bar Entropy of gas at standard conditions (1 bar) ΔfH°gas Enthalpy of formation of gas at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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