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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

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

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

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

Quantity Value Units Method Reference Comment
Deltar348.9 ± 8.4kJ/molPIMSBerkowitz, Ellison, et al., 1994Please also see Ruscic, Schwarz, et al., 1990. Value recommended in the critical survey Berkowitz, Ellison, et al., 1994.
Deltar<358.kJ/molPIMSRuscic, Schwarz, et al., 1990Temperature: 0 K. A value of 343. ± 8. kJ/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
Deltar>236.kJ/molPIMSRuscic, Schwarz, et al., 1990Temperature: 0 K. A value of 247. kJ/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
Deltar47.0 ± 4.1kJ/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 GeH3+ (ion structure unspecified)

Quantity Value Units Method Reference Comment
Deltaf(+) ion<=983.kJ/molN/AN/A 

Electron affinity determinations

EA (eV) Method Reference Comment
1.61 ± 0.12D-EADecouzon, Gal, et al., 1993The neutral acid «DELTA»Hf 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); ; «DELTA»S(EA)=5.0; B

Ionization energy determinations

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

Vibrational and/or electronic energy levels

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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: Marilyn E. Jacox

State:   5p 2A2


 Energy 
 (cm-1
 Med.   Transition   «lambda»min 
 (nm) 
 «lambda»max 
 (nm) 
 References

To = 47705 ± 5 gas Johnson, Tsai, et al., 1988


Vib. 
sym. 
 No.   Approximate 
 type of mode 
 cm-1   Med.   Method   References

a2 2 OPLA 756 ± 5 gas MPI Johnson, Tsai, et al., 1988

State:   X


Vib. 
sym. 
 No.   Approximate 
 type of mode 
 cm-1   Med.   Method   References

a1 2 Umbrella 663 ± 10 gas MPI Johnson, Tsai, et al., 1988
2 Umbrella 667.8 Ne IR Wang, Andrews, et al., 2002
2 Umbrella 667.0 Ar IR Wang, Andrews, et al., 2002
e 3 GeH3 stretch 2050 T gas DL Quandt and Hershberger, 1995
3 GeH3 stretch 2089.4 Ne IR Wang, Andrews, et al., 2002
3 GeH3 stretch 2074.1 Ar IR Wang, Andrews, et al., 2002
3 GeH3 stretch 2093.3 H2 IR Wang and Andrews, 2003
4 Deformation 857.2 Ne IR Wang, Andrews, et al., 2002
4 Deformation 852.4 Ar IR Wang, Andrews, et al., 2002
4 Deformation 853.5 H2 IR Wang and Andrews, 2003

Additional references: Jacox, 1994, page 128

Notes

TTentative assignment or approximate value
oEnergy separation between the v = 0 levels of the excited and electronic ground states.

References

Go To: Top, Reaction thermochemistry data, Gas phase ion energetics data, Vibrational and/or electronic energy levels, NIST Free Links, Notes

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]

Johnson, Tsai, et al., 1988
Johnson, R.D., III; Tsai, B.P.; Hudgens, J.W., The electronic spectrum of the GeH3 radical, J. Chem. Phys., 1988, 89, 8, 4558, https://doi.org/10.1063/1.454796 . [all data]

Wang, Andrews, et al., 2002
Wang, X.; Andrews, L.; Kushto, G.P., Infrared Spectra of the Novel Ge, J. Phys. Chem. A, 2002, 106, 24, 5809, https://doi.org/10.1021/jp020219v . [all data]

Quandt and Hershberger, 1995
Quandt, R.W.; Hershberger, J.F., Kinetics of GeH3 reactions with NO, NO2, and O2, Chem. Phys. Lett., 1995, 233, 5-6, 559, https://doi.org/10.1016/0009-2614(94)01510-3 . [all data]

Wang and Andrews, 2003
Wang, X.; Andrews, L., Infrared Spectra of Group 14 Hydrides in Solid Hydrogen: Experimental Observation of PbH, J. Am. Chem. Soc., 2003, 125, 21, 6581, https://doi.org/10.1021/ja029862l . [all data]

Jacox, 1994
Jacox, M.E., Vibrational and electronic energy levels of polyatomic transient molecules, American Chemical Society, Washington, DC, 1994, 464. [all data]


Notes

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