Silicon dimer

• Formula: Si₂
• Molecular weight: 56.1710
• IUPAC Standard InChI: InChI=1S/Si2/c1-2 Copy

  
• IUPAC Standard InChIKey: NTQGILPNLZZOJH-UHFFFAOYSA-N Copy
• CAS Registry Number: 12597-35-2
• 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
  • Constants of diatomic molecules
  • References
  • Notes
• Other data available:
  • Gas phase thermochemistry data
• Data at other public NIST sites:
  • Gas Phase Kinetics Database
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Gas phase ion energetics 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 as indicated in comments:
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
RDSH - Henry M. Rosenstock, Keith Draxl, Bruce W. Steiner, and John T. Herron
B - John E. Bartmess

View reactions leading to Si₂⁺ (ion structure unspecified)

Electron affinity determinations

Ionization energy determinations

Constants of diatomic molecules

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: Klaus P. Huber and Gerhard H. Herzberg

Data collected through August, 1977

Notes

References

Go To: Top, Gas phase ion energetics data, Constants of diatomic molecules, Notes

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

Peppernick, Gunaratne, et al., 2010
Peppernick, S.J.; Gunaratne, K.D.D.; Sayres, S.G.; Castleman, A.W., Photoelectron imaging of small silicon cluster anions, Si-n- (n=2-7), J. Chem. Phys., 2010, 132, 4, 044302, https://doi.org/10.1063/1.3299271 . [all data]

Arnold, Kitsopoulos, et al., 1993
Arnold, C.C.; Kitsopoulos, T.N.; Neumark, D.M., Reassignment of the Si2(-) Photodetachment Spectra, J. Chem. Phys., 1993, 99, 1, 766, https://doi.org/10.1063/1.465757 . [all data]

Nimlos, Harding, et al., 1987
Nimlos, M.R.; Harding, L.B.; Ellison, G.B., The Electronic States of Si₂ and Si₂^- as Revealed by Photoelectron Spectroscopy, J. Chem. Phys., 1987, 87, 9, 5116, https://doi.org/10.1063/1.453679 . [all data]

Mandich, Bondybey, et al., 1987
Mandich, M.L.; Bondybey, V.E.; Reents, W.D., Reactive Etching of Positive and Negative Silicon Cluster Ions by Nitrogen Dioxide, J. Chem. Phys., 1987, 86, 7, 4245, https://doi.org/10.1063/1.451885 . [all data]

Winstead, Paukstis, et al., 1995
Winstead, C.B.; Paukstis, S.J.; Walters, J.L.; Gole, J.L., Multiphoton ionization of Ag₂: Assessment of a new excited electronic state and resolution of the Ag₂ ionization potential, J. Chem. Phys., 1995, 102, 1877. [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]

Verhaegen, Stafford, et al., 1964
Verhaegen, G.; Stafford, F.E.; Drowart, J., Mass spectrometric study of the systems boron-carbon and boron-carbon-silicon, J. Chem. Phys., 1964, 40, 1622. [all data]

Drowart, DeMaria, et al., 1958
Drowart, J.; DeMaria, G.; Inghram, M.G., Thermodynamic study of SiC utilizing a mass spectrometer, J. Chem. Phys., 1958, 29, 1015. [all data]

Dubois and Leclercq, 1971
Dubois, I.; Leclercq, H., Absorption spectrum of Si₂ in the visible and near-ultraviolet region, Can. J. Phys., 1971, 49, 3053. [all data]

Milligan and Jacox, 1970
Milligan, D.E.; Jacox, M.E., Infrared and ultraviolet spectra of the products of the vacuum-ultraviolet photolysis of silane isolated in an argon matrix, J. Chem. Phys., 1970, 52, 2594. [all data]

Douglas, 1955
Douglas, A.E., The spectrum of the Si₂ molecule, Can. J. Phys., 1955, 33, 801. [all data]

Weltner and McLeod, 1964
Weltner, W., Jr.; McLeod, D., Jr., Spectroscopy of Silicon Carbide and Silicon Vapors Trapped in Neon and Argon Matrices at 4° and 20°K, J. Chem. Phys., 1964, 41, 1, 235, https://doi.org/10.1063/1.1725627 . [all data]

Verma and Warsop, 1963
Verma, R.D.; Warsop, P.A., The absorption spectrum of the Si₂ molecule, Can. J. Phys., 1963, 41, 152. [all data]

Notes

Go To: Top, Gas phase ion energetics data, Constants of diatomic molecules, References

• Symbols used in this document:
  

  EA	Electron affinity

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