Germyl radical


Reaction 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.

Data compiled by: José A. Martinho Simões

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Individual Reactions

Germane (g) = Hydrogen atom (g) + Germyl radical (g)

By formula: H4Ge (g) = H (g) + H3Ge (g)

Quantity Value Units Method Reference Comment
Δr83.4 ± 2.0kcal/molPIMSBerkowitz, Ellison, et al., 1994Please also see Ruscic, Schwarz, et al., 1990. Value recommended in the critical survey Berkowitz, Ellison, et al., 1994.
Δr<85.6kcal/molPIMSRuscic, Schwarz, et al., 1990Temperature: 0 K. A value of 82. ± 2. kcal/mol is recommended in Ruscic, Schwarz, et al., 1990.

Germyl radical (g) = Hydrogen atom (g) + Germylene (g)

By formula: H3Ge (g) = H (g) + H2Ge (g)

Quantity Value Units Method Reference Comment
Δr>56.4kcal/molPIMSRuscic, Schwarz, et al., 1990Temperature: 0 K. A value of 59.0 kcal/mol is recommended in Ruscic, Schwarz, et al., 1990.

Iodine atom (g) + Germane (g) = Hydrogen iodide (g) + Germyl radical (g)

By formula: I (g) + H4Ge (g) = HI (g) + H3Ge (g)

Quantity Value Units Method Reference Comment
Δr11.2 ± 0.98kcal/molKinGNoble and Walsh, 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 compiled as indicated in comments:
LL - Sharon G. Lias and Joel F. Liebman
B - John E. Bartmess

View reactions leading to H3Ge+ (ion structure unspecified)

Quantity Value Units Method Reference Comment
Δf(+) ion≤235.kcal/molN/AN/A 

Electron affinity determinations

EA (eV) Method Reference Comment
1.61 ± 0.12D-EADecouzon, Gal, et al., 1993The neutral acid ΔHf may be ca. 4 kcal/mol too positive: G2 calculations, Mayer, Gal, et al., 1997; B
<1.739 ± 0.043LPDReed and Brauman, 1974B
1.57668N/ACheck, Faust, et al., 2001Fe(CO)-(q); ; ΔS(EA)=5.0; B

Ionization energy determinations

IE (eV) Method Reference Comment
≤7.948 ± 0.005PIRuscic, Schwarz, et al., 1990LL

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.

Berkowitz, Ellison, et al., 1994
Berkowitz, J.; Ellison, G.B.; Gutman, D., Three methods to measure RH bond energies, J. Phys. Chem., 1994, 98, 2744. [all data]

Ruscic, Schwarz, et al., 1990
Ruscic, B.; Schwarz, M.; Berkowitz, J., Photoionization studies of GeHn(n = 2-4), J. Chem. Phys., 1990, 92, 1865. [all data]

Noble and Walsh, 1983
Noble, P.N.; Walsh, R., Kinetics of the gas phase reaction between iodine and monogermane and the bond dissociation energy D(H3Ge-H), Int. J. Chem. Kinet., 1983, 15, 547. [all data]

Decouzon, Gal, et al., 1993
Decouzon, M.; Gal, J.F.; Gayraud, J.; Maria, P.C.; Vaglio, G.A.; Volpe, P., Fourier Transform-Ion Cyclotron Resonance Study of the Gas-Phase Acidities of Germane and Methylgermane - Bond Dissociation Energy of German, J. Am. Soc. Mass Spectrom., 1993, 4, 1, 54, https://doi.org/10.1016/1044-0305(93)85042-V . [all data]

Mayer, Gal, et al., 1997
Mayer, P.M.; Gal, J.-F.; Radom, L., The Heats of Formation, Gas-phase Acidities, and Related Thermochemical Properties of the Third-row Hydrides GeH4, AsH3, SeH2, and HBr from G2 ab initio Calculations, Int. J. Mass Spectrom. Ion Proc., 1997, 167/168, 689, https://doi.org/10.1016/S0168-1176(97)00127-4 . [all data]

Reed and Brauman, 1974
Reed, K.J.; Brauman, J.I., Photodetachment of electrons from Group IVa binary hydride anions: The electron affinities of the SiH3 and GeH3 radicals, J. Chem. Phys., 1974, 61, 4830. [all data]

Check, Faust, et al., 2001
Check, C.E.; Faust, T.O.; Bailey, J.M.; Wright, B.J.; Gilbert, T.M.; Sunderlin, L.S., Addition of Polarization and Diffuse Functions to the LANL2DZ Basis Set for P-Block Elements, J. Phys. Chem. A,, 2001, 105, 34, 8111, https://doi.org/10.1021/jp011945l . [all data]


Notes

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