Silylene

• Formula: H₂Si
• Molecular weight: 30.1014
• IUPAC Standard InChI: InChI=1S/H2Si/h1H2 Copy

  
• IUPAC Standard InChIKey: XMIJDTGORVPYLW-UHFFFAOYSA-N Copy
• CAS Registry Number: 13825-90-6
• Chemical structure:
  This structure is also available as a 2d Mol file or as a computed 3d SD file
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• Information on this page:
  • Gas phase ion energetics data
  • Vibrational and/or electronic energy levels
  • References
  • Notes
• Other data available:
  • Reaction thermochemistry data
  • Ion clustering data
• Data at other public NIST sites:
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Gas phase ion energetics data

Go To: Top, Vibrational and/or electronic energy levels, 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:
HL - Edward P. Hunter and Sharon G. Lias

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

View reactions leading to H₂Si⁺ (ion structure unspecified)

Electron affinity determinations

Ionization energy determinations

De-protonation reactions

HSi^- +  =

By formula: HSi^- + H⁺ = H₂Si

Vibrational and/or electronic energy levels

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: Marilyn E. Jacox

State:   B

State:   A

State:   a

State:   X

Additional references: Jacox, 1994, page 19; Jacox, 1998, page 131; Jacox, 2003, page 17; Dubois, Duxbury, et al., 1975; Inoue and Suzuki, 1985; Thoman and Steinfeld, 1986; Duxbury, Alijah, et al., 1993; Fukushima and Obi, 1994

Notes

References

Go To: Top, Gas phase ion energetics data, Vibrational and/or electronic energy levels, Notes

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Hunter and Lias, 1998
Hunter, E.P.; Lias, S.G., Evaluated Gas Phase Basicities and Proton Affinities of Molecules: An Update, J. Phys. Chem. Ref. Data, 1998, 27, 3, 413-656, https://doi.org/10.1063/1.556018 . [all data]

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 SiH_n (n=1-4), J. Chem. Phys., 1987, 86, 1235. [all data]

Ding, Cassidy, et al., 1985
Ding, A.; Cassidy, R.; Cordis, L.; Lampe, F., The photoionization spectra of effusing and supersonic molecular beams of Mmnosilane, J. Chem. Phys., 1985, 83, 3426. [all data]

Muramoto, Ishikawa, et al., 2005
Muramoto, Y.; Ishikawa, H.; Mikami, N., First observation of the B [sup 1]A[sub 1] state of SiH[sub 2] and SiD[sub 2] radicals by optical-optical double resonance spectroscopy, J. Chem. Phys., 2005, 122, 15, 154302, https://doi.org/10.1063/1.1881172 . [all data]

Dubois, Herzberg, et al., 1967
Dubois, I.; Herzberg, G.; Verma, R.D., Spectrum of SiH2, J. Chem.Phys., 1967, 47, 10, 4262, https://doi.org/10.1063/1.1701609 . [all data]

Dubois, 1968
Dubois, I., The absorption spectrum of the free SiH, Can. J. Phys., 1968, 46, 22, 2485, https://doi.org/10.1139/p68-608 . [all data]

Ishikawa and Kajimoto, 1991
Ishikawa, H.; Kajimoto, O., Fermi resonance and vibrational analysis of SiH2 () based on the LIF excitation spectra of the transitions, J. Mol. Spectrosc., 1991, 150, 2, 610, https://doi.org/10.1016/0022-2852(91)90252-6 . [all data]

Fukushima, Mayama, et al., 1992
Fukushima, M.; Mayama, S.; Obi, K., Jet spectroscopy and excited state dynamics of SiH2 and SiD2, J. Chem. Phys., 1992, 96, 1, 44, https://doi.org/10.1063/1.462479 . [all data]

Ishikawa and Kajimoto, 1993
Ishikawa, H.; Kajimoto, O., Vibrational Analysis of SiH2 (Ã1B1), J. Mol. Spectrosc., 1993, 160, 1, 1, https://doi.org/10.1006/jmsp.1993.1153 . [all data]

Escribano and Campargue, 1998
Escribano, R.; Campargue, A., Absorption spectroscopy of SiH[sub 2] near 640 nm, J. Chem. Phys., 1998, 108, 15, 6249, https://doi.org/10.1063/1.476062 . [all data]

Nakajima, Kawai, et al., 2002
Nakajima, M.; Kawai, A.; Fukushima, M.; Obi, K., LIF spectroscopy and dissociation dynamics of the SiH2 radical in the (1,v2,0) state, Chem. Phys. Lett., 2002, 364, 1-2, 99, https://doi.org/10.1016/S0009-2614(02)01308-8 . [all data]

Ishikawa and Kajimoto, 1995
Ishikawa, H.; Kajimoto, O., Reanalysis of the Vibrational Resonances of SiH2 in the X1A1 State, J. Mol. Spectrosc., 1995, 174, 1, 270, https://doi.org/10.1006/jmsp.1995.1286 . [all data]

Hirota and Ishikawa, 1999
Hirota, E.; Ishikawa, H., The vibrational spectrum and molecular constants of silicon dihydride SiH[sub 2] in the ground electronic state, J. Chem. Phys., 1999, 110, 9, 4254, https://doi.org/10.1063/1.478308 . [all data]

Ishikawa, Muramoto, et al., 2002
Ishikawa, H.; Muramoto, Y.; Mikami, N., Stimulated Emission Pumping Spectroscopy of SiH2: First Observation of the Spin--Orbit Interaction between the X1A1 and the ã3B1 States, J. Mol. Spectrosc., 2002, 216, 1, 90, https://doi.org/10.1006/jmsp.2002.8666 . [all data]

Andrews and Wang, 2002
Andrews, L.; Wang, X., Infrared Spectra of the Novel Si, J. Phys. Chem. A, 2002, 106, 34, 7696, https://doi.org/10.1021/jp0204814 . [all data]

Fredin, Hauge, et al., 1985
Fredin, L.; Hauge, R.H.; Kafafi, Z.H.; Margrave, J.L., Matrix isolation studies of the reactions of silicon atoms with molecular hydrogen. The infrared spectrum of silylene, J. Chem. Phys., 1985, 82, 8, 3542, https://doi.org/10.1063/1.448933 . [all data]

Legay-Sommaire and Legay, 1998
Legay-Sommaire, N.; Legay, F., Photochemical Insertion Reaction of Hg in SiH, J. Phys. Chem. A, 1998, 102, 45, 8759, https://doi.org/10.1021/jp9821533 . [all data]

Inoue and Suzuki, 1984
Inoue, G.; Suzuki, M., Laser-induced fluorescence of the SiH2 radical, Chem. Phys. Lett., 1984, 105, 6, 641, https://doi.org/10.1016/0009-2614(84)85673-0 . [all data]

Yamada, Kanamori, et al., 1989
Yamada, C.; Kanamori, H.; Hirota, E.; Nishiwaki, N.; Itabashi, N.; Kato, K.; Goto, T., Detection of the silylene ν2 band by infrared diode laser kinetic spectroscopy, J. Chem. Phys., 1989, 91, 8, 4582, https://doi.org/10.1063/1.456746 . [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]

Jacox, 1998
Jacox, M.E., Vibrational and electronic energy levels of polyatomic transient molecules: supplement A, J. Phys. Chem. Ref. Data, 1998, 27, 2, 115-393, https://doi.org/10.1063/1.556017 . [all data]

Jacox, 2003
Jacox, M.E., Vibrational and electronic energy levels of polyatomic transient molecules: supplement B, J. Phys. Chem. Ref. Data, 2003, 32, 1, 1-441, https://doi.org/10.1063/1.1497629 . [all data]

Dubois, Duxbury, et al., 1975
Dubois, I.; Duxbury, G.; Dixon, R.N., J. Chem. Soc., 1975, Faraday Trans. 2 71, 799. [all data]

Inoue and Suzuki, 1985
Inoue, G.; Suzuki, M., Reactions of SiH2(X1A1) with H2, CH4, C2H4, SiH4 and Si2H6 at 298 K, Chem. Phys. Lett., 1985, 122, 4, 361, https://doi.org/10.1016/0009-2614(85)80237-2 . [all data]

Thoman and Steinfeld, 1986
Thoman, J.W., Jr.; Steinfeld, J.I., Laser-excited fluorescence detection of SiH2 produced in IR MPD of organosilanes, Chem. Phys. Lett., 1986, 124, 1, 35, https://doi.org/10.1016/0009-2614(86)85008-4 . [all data]

Duxbury, Alijah, et al., 1993
Duxbury, G.; Alijah, A.; Trieling, R.E., Renner--Teller and spin--orbit interactions in SiH2, J. Chem. Phys., 1993, 98, 2, 811, https://doi.org/10.1063/1.464245 . [all data]

Fukushima and Obi, 1994
Fukushima, M.; Obi, K., Rotational analysis of the SiD2 A 1B1--X 1A1 transition observed in a jet, J. Chem. Phys., 1994, 100, 9, 6221, https://doi.org/10.1063/1.467085 . [all data]

Notes

Go To: Top, Gas phase ion energetics data, Vibrational and/or electronic energy levels, References

• Symbols used in this document:
  

  EA	Electron affinity
  ΔrH°	Enthalpy of reaction at standard conditions

• Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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