Silyl radical

• Formula: H₃Si
• Molecular weight: 31.1093
• IUPAC Standard InChI: InChI=1S/H3Si/h1H3 Copy

  
• IUPAC Standard InChIKey: OLRJXMHANKMLTD-UHFFFAOYSA-N Copy
• CAS Registry Number: 13765-44-1
• 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:
  • Reaction thermochemistry data
  • Gas phase ion energetics data
  • References
  • Notes
• Other data available:
  • Vibrational and/or electronic energy levels
• Data at other public NIST sites:
  • Electron-Impact Ionization Cross Sections (on physics web site)
  • Gas Phase Kinetics Database
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Reaction thermochemistry 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 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

H₂Si^- +  =

By formula: H₂Si^- + H⁺ = H₃Si

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

View reactions leading to H₃Si⁺ (ion structure unspecified)

Electron affinity determinations

Ionization energy determinations

De-protonation reactions

H₂Si^- +  =

By formula: H₂Si^- + H⁺ = H₃Si

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.

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]

Wetzel, Salomon, et al., 1989
Wetzel, D.M.; Salomon, K.E.; Berger, S.; Brauman, J.I., Gas-Phase Acidities of Organosilanes and Electron Affinities of Organosilyl Radicals, J. Am. Chem. Soc., 1989, 111, 11, 3835, https://doi.org/10.1021/ja00193a013 . [all data]

Nimlos and Ellison, 1986
Nimlos, M.R.; Ellison, G.B., Photoelectron spectroscopy of SiH₃^- and SiD₃^-, J. Am. Chem. Soc., 1986, 108, 6522. [all data]

Bartmess, Scott, et al., 1979
Bartmess, J.E.; Scott, J.A.; McIver, R.T., Jr., The gas phase acidity scale from methanol to phenol, J. Am. Chem. Soc., 1979, 101, 6047. [all data]

Reed and Brauman, 1974
Reed, K.J.; Brauman, J.I., Photodetachment of electrons from Group IVa binary hydride anions: The electron affinities of the SiH₃ and GeH₃ radicals, J. Chem. Phys., 1974, 61, 4830. [all data]

Check, Faust, et al., 2001
Check, C.E.; Faust, T.O.; Bailey, J.M.; Wright, B.J.; Gilbert, T.M.; Sunderlin, L.S., Addition of Polarization and Diffuse Functions to the LANL2DZ Basis Set for P-Block Elements, J. Phys. Chem. A,, 2001, 105, 34, 8111, https://doi.org/10.1021/jp011945l . [all data]

Nagano, Murthy, et al., 1993
Nagano, Y.; Murthy, S.; Beauchamp, J.L., Thermochemical properties and gas-phase ion chemistry of phenylsilane investigated by FT-ICR spectrometry. Identification of parent- and fragment-ion structural isomers by their specific reactivities, J. Am. Chem. Soc., 1993, 115, 10805. [all data]

Johnson III, Tsai, et al., 1989
Johnson III, R.D.; Tsai, B.P.; Hudgens, J.W., Multiphoton ionization of SiH₃ and SID₃ radicals: Electronic spectra, vibrational analyses of the ground and Rydberg states, and ionization potentials, J. Chem. Phys., 1989, 91, 3340. [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]

Dyke, Jonathan, et al., 1983
Dyke, J.M.; Jonathan, N.; Morris, A.; Ridha, A.; Winter, M.J., Vacuum ultraviolet photoelectron spectroscopy of transient species. XVII. The SiH₃ (X2A1) radical, Chem. Phys., 1983, 81, 481. [all data]

Notes

Go To: Top, Reaction thermochemistry data, Gas phase ion energetics data, References

• Symbols used in this document:
  

  EA	Electron affinity
  IE (evaluated)	Recommended ionization energy
  ΔfH(+) ion,0K	Enthalpy of formation of positive ion at 0K
  ΔrH°	Enthalpy of reaction at standard conditions

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