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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Reaction thermochemistry data
Go To: Top, Gas phase ion energetics data, References, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Data compiled by: John E. Bartmess
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
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 |
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 |
Gas phase ion energetics data
Go To: Top, Reaction thermochemistry data, 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, Reaction thermochemistry 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.
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]
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]
Notes
Go To: Top, Reaction thermochemistry data, 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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