Silylidyne
- Formula: HSi
- Molecular weight: 29.0934
- IUPAC Standard InChIKey: QHGSGZLLHBKSAH-UHFFFAOYSA-N
- CAS Registry Number: 13774-94-2
- Chemical structure:
This structure is also available as a 2d Mol file or as a computed 3d SD file
The 3d structure may be viewed using Java or Javascript. - Permanent link for this species. Use this link for bookmarking this species for future reference.
- Information on this page:
- Other data available:
- Data at other public NIST sites:
- Options:
Gas phase ion energetics data
Go To: Top, Ion clustering 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 as indicated in comments:
B - John E. Bartmess
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
View reactions leading to HSi+ (ion structure unspecified)
Electron affinity determinations
EA (eV) | Method | Reference | Comment |
---|---|---|---|
1.2771 ± 0.0087 | LPES | Kasdan, Herbst, et al., 1975 | B |
Ionization energy determinations
IE (eV) | Method | Reference | Comment |
---|---|---|---|
7.89 ± 0.07 | END | Boo and Armentrout, 1987 | LBLHLM |
7.91 ± 0.01 | PI | Berkowitz, Greene, et al., 1987 | LBLHLM |
8.27 ± 0.06 | S | Carslon, Copley, et al., 1980 | LLK |
8.04 | DER | Huber and Herzberg, 1979 | LLK |
7.91 | S | Rao and Lakshman, 1971 | LLK |
8.01 ± 0.08 | DER | Douglas and Lutz, 1970 | RDSH |
De-protonation reactions
Si- + =
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 353.1 ± 2.7 | kcal/mol | D-EA | Blondel, Chaibi, et al., 2005 | gas phase; (28)Si: 1.3895213(13) eV; revised analysis of Blondel, Delsart, et al., 2001; B |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | 347.9 ± 2.8 | kcal/mol | H-TS | Blondel, Chaibi, et al., 2005 | gas phase; (28)Si: 1.3895213(13) eV; revised analysis of Blondel, Delsart, et al., 2001; B |
Ion clustering 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. Searches may be limited to ion clustering reactions. A general reaction search form is also available.
Clustering reactions
(H2Si- • 4294967295) +
= H2Si-
By formula: (H2Si- • 4294967295HSi) + HSi = H2Si-
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 83.4 ± 2.3 | kcal/mol | N/A | Kasdan, Herbst, et al., 1975 | gas phase |
References
Go To: Top, Gas phase ion energetics data, Ion clustering data, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Kasdan, Herbst, et al., 1975
Kasdan, A.; Herbst, E.; Lineberger, W.C.,
Laser photoelectron spectrometry of the negative ions of silicon and its hydrides,
J. Chem. Phys., 1975, 62, 541. [all data]
Boo and Armentrout, 1987
Boo, B.H.; Armentrout, P.B.,
Reaction of silicon ion (2P) with silane (SiH4, SiD4) heats of formation of SiHn, SiHn+ (n=1,2,3), and Si2Hn+ (n=0,1,2,3) remarkable isotope exchange reaction involving four hydrogen shifts,
J. Am. Chem. Soc., 1987, 109, 3549. [all data]
Berkowitz, Greene, et al., 1987
Berkowitz, J.; Greene, J.P.; Cho, H.; Ruscic, B.,
Photoionization mass spectrometric studies of SiHn (n=1-4),
J. Chem. Phys., 1987, 86, 1235. [all data]
Carslon, Copley, et al., 1980
Carslon, T.A.; Copley, J.; Duric, N.; Perman, N. -Elander; Larsson, M.; Lyyra, M.,
The oscillator strengths and the dissociation energy of SiH+ as determined from time resolved precision spectroscopy,
Astron. Astrophys., 1980, 83, 238. [all data]
Huber and Herzberg, 1979
Huber, K.P.; Herzberg, G.,
Molecular Spectra and Molecular Structure. IV. Constants of Diatomic Molecules,, Van Nostrand Reinhold Co., 1979, ,1. [all data]
Rao and Lakshman, 1971
Rao, T.V.R.; Lakshman, S.V.J.,
The true potential energy curves and Franck-Condon factors of SiH and SiH+ molecules,
Physica, 1971, 56, 322. [all data]
Douglas and Lutz, 1970
Douglas, A.E.; Lutz, B.L.,
Spectroscopic identification of the SiH+ molecule: the A 1π-X1+ system,
Can. J. Phys., 1970, 48, 247. [all data]
Blondel, Chaibi, et al., 2005
Blondel, C.; Chaibi, W.; Delsart, C.; Drag, C.; Goldfarb, F.; Kroger, S.,
The electron affinities of O, Si, and S revisited with the photodetachment microscope,
Eur. Phys. J. D, 2005, 33, 3, 335-342, https://doi.org/10.1140/epjd/e2005-00069-9
. [all data]
Blondel, Delsart, et al., 2001
Blondel, C.; Delsart, C.; Goldfarb, F.,
Electron spectrometry at the mu eV level and the electron affinities of Si and F,
J. Phys. B: Atom. Mol. Opt. Phys., 2001, 34, 9, L281-L288, https://doi.org/10.1088/0953-4075/34/9/101
. [all data]
Notes
Go To: Top, Gas phase ion energetics data, Ion clustering data, References
- Symbols used in this document:
EA Electron affinity 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
- The National Institute of Standards and Technology (NIST) uses its best efforts to deliver a high quality copy of the Database and to verify that the data contained therein have been selected on the basis of sound scientific judgment. However, NIST makes no warranties to that effect, and NIST shall not be liable for any damage that may result from errors or omissions in the Database.
- Customer support for NIST Standard Reference Data products.