Magnesium dimer


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
Δfgas68.745kcal/molReviewChase, 1998Data last reviewed in September, 1983
Quantity Value Units Method Reference Comment
gas,1 bar57.407cal/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 (cal/mol*K)
    H° = standard enthalpy (kcal/mol)
    S° = standard entropy (cal/mol*K)
    t = temperature (K) / 1000.

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Temperature (K) 298. to 800.800. to 2000.2000. to 4000.4000. to 6000.
A 5.1295183.463385163.2063-876.1759
B -0.5865662.482696-113.0935387.8848
C 0.764283-1.51828928.62500-60.24570
D -0.3443430.326733-2.2872543.196631
E 0.0704670.285968-113.39701587.345
F 67.4710868.41157-146.68261973.150
G 64.1539262.11042115.0143199.1150
H 68.7440368.7440368.7440368.74403
ReferenceChase, 1998Chase, 1998Chase, 1998Chase, 1998
Comment Data last reviewed in September, 1983 Data last reviewed in September, 1983 Data last reviewed in September, 1983 Data last reviewed in September, 1983

Gas phase ion energetics 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.

Data evaluated by: Edward P. Hunter and Sharon G. Lias

Quantity Value Units Method Reference Comment
Proton affinity (review)220.kcal/molN/AHunter and Lias, 1998 
Quantity Value Units Method Reference Comment
Gas basicity211.9kcal/molN/AHunter and Lias, 1998 

References

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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]


Notes

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