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Disilane


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 as indicated in comments:
L - Sharon G. Lias

Data compiled as indicated in comments:
B - John E. Bartmess
LL - Sharon G. Lias and Joel F. Liebman
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

Quantity Value Units Method Reference Comment
IE (evaluated)9.74 ± 0.02eVN/AN/AL

Ionization energy determinations

IE (eV) Method Reference Comment
9.74 ± 0.02PIRuscic and Berkowitz, 1991T = 0K; LL
9.9 ± 0.4EIChatham, Hils, et al., 1984LBLHLM
10.0PEPotzinger, Ritter, et al., 1975LLK
10.15 ± 0.10EIPotzinger and Lampe, 1969RDSH
10.6 ± 0.3EISaalfeld and Svec, 1963RDSH
10.53PEBock, Ensslin, et al., 1976Vertical value; LLK
10.53PEEnsslin, Bock, et al., 1974Vertical value; LLK

Appearance energy determinations

Ion AE (eV) Other Products MethodReferenceComment
HSi+14. ± 2.?EIChatham, Hils, et al., 1984LBLHLM
HSi2+<=15.0?PIRuscic and Berkowitz, 1991T = 0K; LL
HSi2+15. ± 2.?EIChatham, Hils, et al., 1984LBLHLM
Si2H+12.9 ± 0.22H2+HEIPotzinger and Lampe, 1969RDSH
H2Si+10. ± 2.?EIChatham, Hils, et al., 1984LBLHLM
H2Si+12.0 ± 0.1SiH4EIPotzinger, Ritter, et al., 1975LLK
SiH2+11.95 ± 0.10SiH4EIPotzinger and Lampe, 1969RDSH
SiH2+11.94 ± 0.04SiH4EISteele and Stone, 1962RDSH
H2Si2+<=11.57 ± 0.03?PIRuscic and Berkowitz, 1991T = 0K; LL
H2Si2+11.5 ± 0.4?EIChatham, Hils, et al., 1984LBLHLM
Si2H2+11.80 ± 0.102H2EIPotzinger and Lampe, 1969RDSH
H3Si+<=11.72 ± 0.02?PIRuscic and Berkowitz, 1991T = 0K; LL
H3Si+11. ± 2.?EIChatham, Hils, et al., 1984LBLHLM
H3Si+11.8 ± 0.1SiH3EIPotzinger, Ritter, et al., 1975LLK
SiH3+11.95 ± 0.15SiH3EIPotzinger and Lampe, 1969RDSH
SiH3+11.31 ± 0.12SiH3EISaalfeld and Svec, 1966RDSH
SiH3+11.3 ± 0.2SiH3EISaalfeld and Svec, 1964RDSH
SiH3+11.85 ± 0.05SiH3EISteele and Stone, 1962RDSH
H3Si2+<=12.70?PIRuscic and Berkowitz, 1991T = 0K; LL
H3Si2+12. ± 1.?EIChatham, Hils, et al., 1984LBLHLM
Si2H3+12.50 ± 0.10H2+HEIPotzinger and Lampe, 1969RDSH
H4Si+11.4 ± 0.1HEIPotzinger, Ritter, et al., 1975LLK
H4Si2+10.8 ± 0.4?EIChatham, Hils, et al., 1984LBLHLM
Si2H4+10.85 ± 0.10H2EIPotzinger and Lampe, 1969RDSH
H4Si2+[H2SiSiH2+]<=10.04 ± 0.02H2PIRuscic and Berkowitz, 1991T = 0K; LL
H4Si2+[H3SiSiH+]<=10.81 ± 0.02H2PIRuscic and Berkowitz, 1991T = 0K; LL
H5Si2+11.41 ± 0.03HPIRuscic and Berkowitz, 1991T = 0K; LL
H5Si2+11.2 ± 0.4HEIChatham, Hils, et al., 1984LBLHLM
Si2H5+11.40 ± 0.10HEIPotzinger and Lampe, 1969RDSH
Si+15. ± 2.?EIChatham, Hils, et al., 1984LBLHLM
Si+15.2 ± 0.3?EISaalfeld and Svec, 1963RDSH
Si2+<=14.5?PIRuscic and Berkowitz, 1991T = 0K; LL
Si2+18. ± 3.?EIChatham, Hils, et al., 1984LBLHLM
Si2+13.0?EIPotzinger and Lampe, 1969RDSH
Si2+12.2 ± 0.3?EISaalfeld and Svec, 1963RDSH

De-protonation reactions

H5Si2- + Hydrogen cation = Disilane

By formula: H5Si2- + H+ = H6Si2

Quantity Value Units Method Reference Comment
Deltar<1312. ± 12.kJ/molAcidKrishnakumar and Srivastava, 1991gas phase; From Si2H6, AP = 0.0 eV/Data for SiH4 plus a-Si effects imply «DELTA»Hacid ca. 360. G3MP2B3 calculations give dHacid=360 kcal/mol; B
Quantity Value Units Method Reference Comment
Deltar<1275. ± 14.kJ/molH-TSKrishnakumar and Srivastava, 1991gas phase; From Si2H6, AP = 0.0 eV/Data for SiH4 plus a-Si effects imply «DELTA»Hacid ca. 360. G3MP2B3 calculations give dHacid=360 kcal/mol; B

References

Go To: Top, 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.

Ruscic and Berkowitz, 1991
Ruscic, B.; Berkowitz, J., Photoionization mass spectrometric study of Si2H6, J. Chem. Phys., 1991, 95, 2407. [all data]

Chatham, Hils, et al., 1984
Chatham, H.; Hils, D.; Robertson, R.; Gallagher, A., Total and partial electron collisional ionization cross sections for CH4, C2H6, SiH4, and Si2H6, J. Chem. Phys., 1984, 81, 1770. [all data]

Potzinger, Ritter, et al., 1975
Potzinger, P.; Ritter, A.; Krause, J., Massenspektrometrische Bestimmung von Bindungsenergien in siliciumorganischen Verbindungen, Z. Naturforsch. A:, 1975, 30, 347. [all data]

Potzinger and Lampe, 1969
Potzinger, P.; Lampe, F.W., An electron impact study of ionization and dissociation of monosilane and disilane, J. Phys. Chem., 1969, 73, 3912. [all data]

Saalfeld and Svec, 1963
Saalfeld, F.E.; Svec, H.J., The mass spectra of volatile hydrides. II. Some higher hydrides of the group IVB and VB elements, Inorg. Chem., 1963, 2, 50. [all data]

Bock, Ensslin, et al., 1976
Bock, H.; Ensslin, W.; Feher, F.; Freund, R., Photoelectron spectra and molecular properties. LI. Ionization potentials of silanes SinH2n+2, J. Am. Chem. Soc., 1976, 98, 668. [all data]

Ensslin, Bock, et al., 1974
Ensslin, W.; Bock, H.; Becker, G., Photoelectron spectra and molecular properties. XXX. «pi» interactions in H3Si- H3C-substituted acetylenes, J. Am. Chem. Soc., 1974, 96, 2757. [all data]

Steele and Stone, 1962
Steele, W.C.; Stone, F.G.A., Silicon-silicon bond dissociation energies in disilane and hexachlorodisilane, J. Am. Chem. Soc., 1962, 84, 3599. [all data]

Saalfeld and Svec, 1966
Saalfeld, F.E.; Svec, H.J., Mass spectra of volatile hydrides. IV. Silylgermane, J. Phys. Chem., 1966, 70, 1753. [all data]

Saalfeld and Svec, 1964
Saalfeld, F.E.; Svec, H.J., Mass spectra of volatile hydrides. III. Silylphosphine, Inorg. Chem., 1964, 3, 1442. [all data]

Krishnakumar and Srivastava, 1991
Krishnakumar, E.; Srivastava, S.K., Dissociative Electron Attachment of Electrons with Si2H6, Int. J. Mass Spectrom. Ion Proc., 1991, 103, 2-3, 107, https://doi.org/10.1016/0168-1176(91)80082-X . [all data]


Notes

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