magnesium
- Formula: Mg
- Molecular weight: 24.3050
- IUPAC Standard InChIKey: FYYHWMGAXLPEAU-UHFFFAOYSA-N
- CAS Registry Number: 7439-95-4
- Chemical structure:
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- Information on this page:
- Other data available:
- Data at other public NIST sites:
- NIST Atomic Spectra Database - Lines Holdings (on physics web site)
- NIST Atomic Spectra Database - Levels Holdings (on physics web site)
- NIST Atomic Spectra Database - Ground states and ionization energies (on physics web site)
- Gas Phase Kinetics Database
- X-ray Photoelectron Spectroscopy Database, version 5.0
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Reaction thermochemistry data
Go To: Top, 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: José A. Martinho Simões
Note: Please consider using the reaction search for this species. This page allows searching of all reactions involving this species. A general reaction search form is also available. Future versions of this site may rely on reaction search pages in place of the enumerated reaction displays seen below.
Individual Reactions
(l) + (cr) = C9H19BrMg (solution)
By formula: BrNO (l) + Mg (cr) = C9H19BrMg (solution)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -231.0 ± 4.4 | kJ/mol | RSC | Holm, 1981 | solvent: Diethyl ether; Due to the possibility of side reactions, the enthalpy of reaction was not considered to be sufficiently reliable for deriving the enthalpy of formation of the Grignard reagent Holm, 1981 |
(l) + (cr) = C7H7BrMg (solution)
By formula: C7H7Br (l) + Mg (cr) = C7H7BrMg (solution)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -275.7 ± 4.4 | kJ/mol | RSC | Holm, 1981 | solvent: Diethyl ether; Due to the possibility of side reactions, the enthalpy of reaction was not considered to be sufficiently reliable for deriving the enthalpy of formation of the Grignard reagent Holm, 1981 |
(cr) + (l) = CH3BrMg (solution)
By formula: Mg (cr) + CH3Br (l) = CH3BrMg (solution)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -267.8 ± 4.4 | kJ/mol | RSC | Holm, 1981 | solvent: Diethyl ether; Due to the possibility of side reactions, the enthalpy of reaction was not considered to be sufficiently reliable for deriving the enthalpy of formation of the Grignard reagent Holm, 1981 |
(cr) + (solution) = CH3IMg (solution)
By formula: Mg (cr) + CH3I (solution) = CH3IMg (solution)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -273.6 ± 0.8 | kJ/mol | RSC | Carson and Skinner, 1950 | solvent: Diethyl ether; It was assumed that MeI(l) has a negligible solution enthalpy in ether |
By formula: 2C5H6 (l) + Mg (cr) = C10H10Mg (cr) + H2 (g)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -142.5 ± 2.9 | kJ/mol | RSC | Hull, Reid, et al., 1967 | Please also see Pedley and Rylance, 1977 and Cox and Pilcher, 1970. |
Gas phase ion energetics data
Go To: Top, Reaction thermochemistry data, References, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Data evaluated as indicated in comments:
HL - Edward P. Hunter and Sharon G. Lias
L - Sharon G. Lias
Data compiled as indicated in comments:
LL - Sharon G. Lias and Joel F. Liebman
LBLHLM - Sharon G. Lias, John E. Bartmess, Joel F. Liebman, John L. Holmes, Rhoda D. Levin, and W. Gary Mallard
LLK - Sharon G. Lias, Rhoda D. Levin, and Sherif A. Kafafi
RDSH - Henry M. Rosenstock, Keith Draxl, Bruce W. Steiner, and John T. Herron
View reactions leading to Mg+ (ion structure unspecified)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
IE (evaluated) | 7.64624 | eV | N/A | N/A | L |
Quantity | Value | Units | Method | Reference | Comment |
Proton affinity (review) | 819.6 | kJ/mol | N/A | Hunter and Lias, 1998 | HL |
Quantity | Value | Units | Method | Reference | Comment |
Gas basicity | 797.3 | kJ/mol | N/A | Hunter and Lias, 1998 | HL |
Ionization energy determinations
IE (eV) | Method | Reference | Comment |
---|---|---|---|
7.64624 | EVAL | Lide, 1992 | LL |
7.646 | S | Kelly, 1987 | LBLHLM |
7.3 | EI | Sasamoto, Hara, et al., 1981 | LLK |
7.72 ± 0.05 | EI | Rauh and Ackermann, 1979 | LLK |
7.63 ± 0.08 | EI | Rauh and Ackermann, 1974 | LLK |
7.646 | S | Moore, 1970 | RDSH |
7.64623 | S | Risberg, 1965 | RDSH |
7.5 ± 0.2 | SI | Zinkiewicz, 1553 | RDSH |
References
Go To: Top, Reaction thermochemistry data, Gas phase ion energetics data, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Holm, 1981
Holm, T.,
J. Chem. Soc., Perkin Trans. II, 1981, 464.. [all data]
Carson and Skinner, 1950
Carson, A.S.; Skinner, H.A.,
Nature, 1950, 165, 484. [all data]
Hull, Reid, et al., 1967
Hull, H.S.; Reid, A.F.; Turnbull, A.G.,
Inorg. Chem., 1967, 6, 805. [all data]
Pedley and Rylance, 1977
Pedley, J.B.; Rylance, J.,
Computer Analysed Thermochemical Data: Organic and Organometallic Compounds, University of Sussex, Brigton, 1977. [all data]
Cox and Pilcher, 1970
Cox, J.D.; Pilcher, G.,
Thermochemistry of Organic and Organometallic Compounds
in Academic Press, New York, 1970. [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]
Lide, 1992
Lide, D.R. (Editor),
Ionization potentials of atoms and atomic ions
in Handbook of Chem. and Phys., 1992, 10-211. [all data]
Kelly, 1987
Kelly, R.L.,
Atomic and ionic spectrum lines of hydrogen through kryton,
J. Phys. Chem. Ref. Data, 1987, 16. [all data]
Sasamoto, Hara, et al., 1981
Sasamoto, T.; Hara, H.; Sata, T.,
Mass spectrometric study of the vaporization of magnesium oxide from magnesium aluminate spinel,
Bull. Chem. Soc. Jpn., 1981, 54, 3327. [all data]
Rauh and Ackermann, 1979
Rauh, E.G.; Ackermann, R.J.,
The first ionization potentials of the transition metals,
J. Chem. Phys., 1979, 70, 1004. [all data]
Rauh and Ackermann, 1974
Rauh, E.G.; Ackermann, R.J.,
First ionization potentials of some refractory oxide vapors,
J. Chem. Phys., 1974, 60, 1396. [all data]
Moore, 1970
Moore, C.E.,
Ionization potentials and ionization limits derived from the analyses of optical spectra,
Natl. Stand. Ref. Data Ser., (U.S. Natl. Bur. Stand.), 1970, 34, 1. [all data]
Risberg, 1965
Risberg, G.,
The spectrum of atomic magnesium, Mg I,
Ark. Fys., 1965, 28, 381. [all data]
Zinkiewicz, 1553
Zinkiewicz, J.M.,
Determination of the ionization potential of Ca and Mg atoms by the surface ionization method using a mass spectrometer,
Proc. Colloq. Spectros. Intern., 14th Debrecen, Hung., 1967,, 1553, 3. [all data]
Notes
Go To: Top, Reaction thermochemistry data, Gas phase ion energetics data, References
- Symbols used in this document:
IE (evaluated) Recommended ionization energy ΔrH° Enthalpy of reaction at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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