Germanium difluoride

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Phase change 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 compiled as indicated in comments:
TRC - Thermodynamics Research Center, NIST Boulder Laboratories, Chris Muzny director
AC - William E. Acree, Jr., James S. Chickos

Quantity Value Units Method Reference Comment
Tfus385.KN/AAdams, Margrave, et al., 1971Uncertainty assigned by TRC = 1.5 K; TRC
Tfus385.KN/AAdams, Margrave, et al., 1970Uncertainty assigned by TRC = 3. K; TRC
Quantity Value Units Method Reference Comment
Δsub19.8 ± 1.0kcal/molMSAdams, Margrave, et al., 1971AC
Δsub22.3 ± 2.5kcal/molN/AAdams, Margrave, et al., 1971AC

Enthalpy of fusion

ΔfusH (kcal/mol) Temperature (K) Reference Comment
2.21(corrected to 298.K)Adams, Margrave, et al., 1971AC

In addition to the Thermodynamics Research Center (TRC) data available from this site, much more physical and chemical property data is available from the following TRC products:


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 compiled as indicated in comments:
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
B - John E. Bartmess

View reactions leading to F2Ge+ (ion structure unspecified)

Electron affinity determinations

EA (eV) Method Reference Comment
>1.30 ± 0.30EIAEHarland, Cradock, et al., 1972From GeF4; G2MP2 calculations indicate an EA of ca. 0.7 eV; B

Ionization energy determinations

IE (eV) Method Reference Comment
12.9 ± 0.3EIAdams, Margrave, et al., 1971, 2LLK
11.8 ± 0.1EIZmbov, Hastie, et al., 1968RDSH
11.65PEJonkers, Van Der Kerk, et al., 1982Vertical value; LBLHLM

Appearance energy determinations

Ion AE (eV) Other Products MethodReferenceComment
GeF+14.0 ± 0.3FEIZmbov, Hastie, et al., 1968RDSH
Ge+18.8 ± 0.3?EIZmbov, Hastie, et al., 1968RDSH

References

Go To: Top, Phase change 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.

Adams, Margrave, et al., 1971
Adams, G.P.; Margrave, J.L.; Steiger, Ronald P.; Wilson, P.W., The enthalpy of sublimation of germanium difluoride and the thermodynamics of sublimation of the Group IVa difluorides, The Journal of Chemical Thermodynamics, 1971, 3, 3, 297-305, https://doi.org/10.1016/S0021-9614(71)80046-0 . [all data]

Adams, Margrave, et al., 1970
Adams, G.P.; Margrave, J.L.; Wilson, P.W., The Enthalpy of Formation of Germanium Difluoride, J. Chem. Thermodyn., 1970, 2, 741-4. [all data]

Harland, Cradock, et al., 1972
Harland, P.W.; Cradock, S.; Thynne, J.C.J., Positive- and negative-ion formation due to the electron bombardment of germanium tetrafluoride, Int. J. Mass Spectrom. Ion Phys., 1972, 10, 169. [all data]

Adams, Margrave, et al., 1971, 2
Adams, G.P.; Margrave, J.L.; Steiger, R.P.; Wilson, P.W., The enthalpy of sublimation of germanium difluoride and the thermodynamics of sublimation of the Group IVa difluorides, J. Chem. Thermodyn., 1971, 3, 297. [all data]

Zmbov, Hastie, et al., 1968
Zmbov, K.F.; Hastie, J.W.; Hauge, R.; Margrave, J.L., Formation of polymeric (GeF2)n in the vapor phase over GeF2, Inorg. Chem., 1968, 7, 608. [all data]

Jonkers, Van Der Kerk, et al., 1982
Jonkers, G.; Van Der Kerk, S.M.; Mooyman, R.; De Lange, C.A., UV photoelectron spectroscopy of transient species: Germanium difluoride (GeF2), Chem. Phys. Lett., 1982, 90, 252. [all data]


Notes

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