Disilane
- Formula: H6Si2
- Molecular weight: 62.2186
- IUPAC Standard InChIKey: PZPGRFITIJYNEJ-UHFFFAOYSA-N
- CAS Registry Number: 1590-87-0
- Chemical structure:
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Gas phase ion energetics data
Go To: Top, References, Notes
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 ± 0.02 | eV | N/A | N/A | L |
Ionization energy determinations
IE (eV) | Method | Reference | Comment |
---|---|---|---|
9.74 ± 0.02 | PI | Ruscic and Berkowitz, 1991 | T = 0K; LL |
9.9 ± 0.4 | EI | Chatham, Hils, et al., 1984 | LBLHLM |
10.0 | PE | Potzinger, Ritter, et al., 1975 | LLK |
10.15 ± 0.10 | EI | Potzinger and Lampe, 1969 | RDSH |
10.6 ± 0.3 | EI | Saalfeld and Svec, 1963 | RDSH |
10.53 | PE | Bock, Ensslin, et al., 1976 | Vertical value; LLK |
10.53 | PE | Ensslin, Bock, et al., 1974 | Vertical value; LLK |
Appearance energy determinations
De-protonation reactions
H5Si2- + =
By formula: H5Si2- + H+ = H6Si2
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | <1312. ± 12. | kJ/mol | Acid | Krishnakumar and Srivastava, 1991 | gas phase; From Si2H6, AP = 0.0 eV/Data for SiH4 plus a-Si effects imply ΔHacid ca. 360. G3MP2B3 calculations give dHacid=360 kcal/mol; B |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | <1275. ± 14. | kJ/mol | H-TS | Krishnakumar and Srivastava, 1991 | gas phase; From Si2H6, AP = 0.0 eV/Data for SiH4 plus a-Si effects imply ΔHacid 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. π 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
Go To: Top, Gas phase ion energetics data, References
- Symbols used in this document:
AE Appearance energy IE (evaluated) Recommended ionization energy ΔrG° Free energy of reaction at standard conditions ΔrH° Enthalpy of reaction at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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