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magnesium

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Gas phase thermochemistry data

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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
Deltafgas147.1 ± 0.8kJ/molReviewCox, Wagman, et al., 1984CODATA Review value
Deltafgas147.10kJ/molReviewChase, 1998Data last reviewed in September, 1983
Quantity Value Units Method Reference Comment
gas,1 bar148.648 ± 0.003J/mol*KReviewCox, Wagman, et al., 1984CODATA Review value
gas,1 bar148.65J/mol*KReviewChase, 1998Data last reviewed in September, 1983

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) 1366.104 - 2200.2200. - 6000.
A 20.7730647.60848
B 0.035592-15.40875
C -0.0319172.875965
D 0.009109-0.120806
E 0.000461-27.01764
F 140.907197.40017
G 173.7799177.2305
H 147.1002147.1002
ReferenceChase, 1998Chase, 1998
Comment Data last reviewed in September, 1983 Data last reviewed in September, 1983

Condensed phase thermochemistry data

Go To: Top, Gas phase thermochemistry data, 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.

Quantity Value Units Method Reference Comment
Deltafliquid4.79kJ/molReviewChase, 1998Data last reviewed in September, 1983
Quantity Value Units Method Reference Comment
liquid,1 bar34.46J/mol*KReviewChase, 1998Data last reviewed in September, 1983
Quantity Value Units Method Reference Comment
solid,1 bar32.67 ± 0.10J/mol*KReviewCox, Wagman, et al., 1984CODATA Review value
Quantity Value Units Method Reference Comment
solid32.67J/mol*KReviewChase, 1998Data last reviewed in September, 1983

Liquid 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) 923. - 1366.104
A 34.30901
B -7.471034×10-10
C 6.146212×10-10
D -1.598238×10-10
E -1.152011×10-11
F -5.439367
G 75.98311
H 4.790011
ReferenceChase, 1998
Comment Data last reviewed in September, 1983

Solid 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. - 923.
A 26.54083
B -1.533048
C 8.062443
D 0.572170
E -0.174221
F -8.501596
G 63.90181
H 0.000000
ReferenceChase, 1998
Comment Data last reviewed in September, 1983

Reaction thermochemistry data

Go To: Top, Gas phase thermochemistry data, Condensed phase 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 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

Nitrosyl bromide (l) + magnesium (cr) = C9H19BrMg (solution)

By formula: BrNO (l) + Mg (cr) = C9H19BrMg (solution)

Quantity Value Units Method Reference Comment
Deltar-231.0 ± 4.4kJ/molRSCHolm, 1981solvent: 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

Benzene, (bromomethyl)- (l) + magnesium (cr) = C7H7BrMg (solution)

By formula: C7H7Br (l) + Mg (cr) = C7H7BrMg (solution)

Quantity Value Units Method Reference Comment
Deltar-275.7 ± 4.4kJ/molRSCHolm, 1981solvent: 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

magnesium (cr) + Methane, bromo- (l) = CH3BrMg (solution)

By formula: Mg (cr) + CH3Br (l) = CH3BrMg (solution)

Quantity Value Units Method Reference Comment
Deltar-267.8 ± 4.4kJ/molRSCHolm, 1981solvent: 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

magnesium (cr) + Methane, iodo- (solution) = CH3IMg (solution)

By formula: Mg (cr) + CH3I (solution) = CH3IMg (solution)

Quantity Value Units Method Reference Comment
Deltar-273.6 ± 0.8kJ/molRSCCarson and Skinner, 1950solvent: Diethyl ether; It was assumed that MeI(l) has a negligible solution enthalpy in ether

21,3-Cyclopentadiene (l) + magnesium (cr) = Magnesium, bis(η(5)-2,4-cyclopentadien-1-yl)- (cr) + Hydrogen (g)

By formula: 2C5H6 (l) + Mg (cr) = C10H10Mg (cr) + H2 (g)

Quantity Value Units Method Reference Comment
Deltar-142.5 ± 2.9kJ/molRSCHull, Reid, et al., 1967Please also see Pedley and Rylance, 1977 and Cox and Pilcher, 1970.

References

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Reaction thermochemistry data, Notes

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Cox, Wagman, et al., 1984
Cox, J.D.; Wagman, D.D.; Medvedev, V.A., CODATA Key Values for Thermodynamics, Hemisphere Publishing Corp., New York, 1984, 1. [all data]

Chase, 1998
Chase, M.W., Jr., NIST-JANAF Themochemical Tables, Fourth Edition, J. Phys. Chem. Ref. Data, Monograph 9, 1998, 1-1951. [all data]

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]


Notes

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Reaction thermochemistry data, References