Magnesium monohydroxide
- Formula: HMgO
- Molecular weight: 41.3123
- IUPAC Standard InChI: InChI=1S/Mg.H2O/h;1H2/q+1;/p-1
- IUPAC Standard InChIKey: UNYOJUYSNFGNDV-UHFFFAOYSA-M
- CAS Registry Number: 12141-11-6
- 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. - Permanent link for this species. Use this link for bookmarking this species for future reference.
- Information on this page:
- Options:
Gas phase thermochemistry data
Go To: Top, Gas phase ion energetics data, Vibrational and/or electronic energy levels, NIST Free Links, 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 | -164.76 | kJ/mol | Review | Chase, 1998 | Data last reviewed in December, 1975 |
| Quantity | Value | Units | Method | Reference | Comment |
| S°gas,1 bar | 226.44 | J/mol*K | Review | Chase, 1998 | Data last reviewed in December, 1975 |
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.
View plot Requires a JavaScript / HTML 5 canvas capable browser.
| Temperature (K) | 298. - 6000. |
|---|---|
| A | 47.86747 |
| B | 8.461889 |
| C | -1.842082 |
| D | 0.142410 |
| E | -0.643625 |
| F | -181.5492 |
| G | 278.3038 |
| H | -164.7550 |
| Reference | Chase, 1998 |
| Comment | Data last reviewed in December, 1975 |
Gas phase ion energetics data
Go To: Top, Gas phase thermochemistry data, Vibrational and/or electronic energy levels, NIST Free Links, References, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Data compiled as indicated in comments:
LLK - Sharon G. Lias, Rhoda D. Levin, and Sherif A. Kafafi
Ionization energy determinations
| IE (eV) | Method | Reference | Comment |
|---|---|---|---|
| 7.5 ± 0.3 | EI | Murad, 1981 | LLK |
Vibrational and/or electronic energy levels
Go To: Top, Gas phase thermochemistry data, Gas phase ion energetics data, NIST Free Links, 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 | |
|---|---|---|---|---|---|---|---|
| Π | 2 | Bend | 188 ± 2 | H | gas | LF | Bunker, Kolbuszewski, et al., 1995 |
| Σ+ | 3 | MgO stretch | 750 ± 3 | gas | LF | Bunker, Kolbuszewski, et al., 1995 | |
Additional references: Jacox, 1998, page 138; Jacox, 2003, page 23; Barclay, Anderson, et al., 1992; Nuccio, Apponi, et al., 1995; Apponi, Anderson, et al., 1999
Notes
| H | (1/2)(2ν) |
References
Go To: Top, Gas phase thermochemistry data, Gas phase ion energetics data, Vibrational and/or electronic energy levels, NIST Free Links, 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]
Murad, 1981
Murad, E.,
Thermochemical properties of the gaseous alkaline earth monohydroxides,
J. Chem. Phys., 1981, 75, 4080. [all data]
Bunker, Kolbuszewski, et al., 1995
Bunker, P.R.; Kolbuszewski, M.; Jensen, P.; Brumm, M.; Anderson, M.A.; Barclay, W.L., Jr.; Ziurys, L.M.; Ni, Y.; Harris, D.O.,
New rovibrational data for MgOH and MgOD and the internuclear potential function of the ground electronic state,
Chem. Phys. Lett., 1995, 239, 4-6, 217, https://doi.org/10.1016/0009-2614(95)00479-N
. [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]
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]
Barclay, Anderson, et al., 1992
Barclay, W.L., Jr.; Anderson, M.A.; Ziurys, L.M.,
The millimeter-wave spectrum of the MgOH radical (X 2Σ+),
Chem. Phys. Lett., 1992, 196, 3-4, 225, https://doi.org/10.1016/0009-2614(92)85959-E
. [all data]
Nuccio, Apponi, et al., 1995
Nuccio, B.P.; Apponi, A.J.; Ziurys, L.M.,
Millimeter-wave rotational spectroscopy of MgOD and CaOD (X 2Σ+),
J. Chem. Phys., 1995, 103, 21, 9193, https://doi.org/10.1063/1.470030
. [all data]
Apponi, Anderson, et al., 1999
Apponi, A.J.; Anderson, M.A.; Ziurys, L.M.,
High resolution spectroscopy of MgOH (X [sup 2]Σ[sup +]) in its V[sub 2] mode: Further evidence for quasilinearity,
J. Chem. Phys., 1999, 111, 24, 10919, https://doi.org/10.1063/1.480455
. [all data]
Notes
Go To: Top, Gas phase thermochemistry data, Gas phase ion energetics data, Vibrational and/or electronic energy levels, NIST Free Links, 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
- The National Institute of Standards and Technology (NIST) uses its best efforts to deliver a high quality copy of the Database and to verify that the data contained therein have been selected on the basis of sound scientific judgment. However, NIST makes no warranties to that effect, and NIST shall not be liable for any damage that may result from errors or omissions in the Database.
- Customer support for NIST Standard Reference Data products.