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H2CSi


Vibrational and/or electronic energy levels

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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: Marilyn E. Jacox

State:   B


 Energy 
 (cm-1
 Med.   Transition   «lambda»min 
 (nm) 
 «lambda»max 
 (nm) 
 References

To = 29312.88 gas B-X 300 342 Leclercq and Dubois, 1979
Harper, Ferrall, et al., 1997
Harper, Waddell, et al., 1997
Hostutler, Smith, et al., 1999


Vib. 
sym. 
 No.   Approximate 
 type of mode 
 cm-1   Med.   Method   References

a1 1 CH2 stretch 2997 gas LF Harper, Waddell, et al., 1997
Hostutler, Smith, et al., 1999
2 CH2 scissors 1101.96 gas AB LF Leclercq and Dubois, 1979
Harper, Waddell, et al., 1997
Hostutler, Smith, et al., 1999
3 CSi stretch 702.00 gas AB LF Leclercq and Dubois, 1979
Harper, Ferrall, et al., 1997
Harper, Waddell, et al., 1997
Hostutler, Smith, et al., 1999
b1 4 OPLA 697 gas LF Hostutler, Smith, et al., 1999
b2 6 CH2 rock 731 gas LF Harper, Waddell, et al., 1997
Hostutler, Smith, et al., 1999

State:   A


 Energy 
 (cm-1
 Med.   Transition   «lambda»min 
 (nm) 
 «lambda»max 
 (nm) 
 References

To = 15132.97 gas Smith, Evans, et al., 2003


Vib. 
sym. 
 No.   Approximate 
 type of mode 
 cm-1   Med.   Method   References

a1 2 CH2 scissors 1288 gas SEP Smith, Evans, et al., 2003
3 CSi stretch 717 gas SEP Smith, Evans, et al., 2003
b1 4 OPLA 661 gas SEP Smith, Evans, et al., 2003
b2 6 CH2 rock 672 gas SEP Smith, Evans, et al., 2003

State:   X


Vib. 
sym. 
 No.   Approximate 
 type of mode 
 cm-1   Med.   Method   References

a1 1 CH2 s-stretch 2947 ± 5 gas LF Smith, Li, et al., 2001
2 CH2 scissors 1273 ± 3 gas SEP Smith, Li, et al., 2001
3 CSi stretch 933 ± 3 gas SEP Smith, Li, et al., 2001
b1 4 OPLA 687 ± 5 H gas SEP Smith, Li, et al., 2001
b2 6 CH2 rock 263 ± 5 gas LF Smith, Li, et al., 2001

Additional references: Jacox, 1994, page 138; Jacox, 1998, page 223; Jacox, 2003, page 169; Izuha, Yamamoto, et al., 1996

Notes

H(1/2)(2nu)
oEnergy separation between the v = 0 levels of the excited and electronic ground states.

References

Go To: Top, 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.

Leclercq and Dubois, 1979
Leclercq, H.; Dubois, I., The absorption spectrum of the H2CSi radical, J. Mol. Spectrosc., 1979, 76, 1-3, 39, https://doi.org/10.1016/0022-2852(79)90216-9 . [all data]

Harper, Ferrall, et al., 1997
Harper, W.W.; Ferrall, E.A.; Hilliard, R.K.; Stogner, S.M.; Grev, R.S.; Clouthier, D.J., Laser Spectroscopic Detection of the Simplest Unsaturated Silylene and Germylene, J. Am. Chem. Soc., 1997, 119, 35, 8361, https://doi.org/10.1021/ja9716012 . [all data]

Harper, Waddell, et al., 1997
Harper, W.W.; Waddell, K.W.; Clouthier, D.J., Jet spectroscopy, structure, anomalous fluorescence, and molecular quantum beats of silylidene (H[sub 2]C=Si), the simplest unsaturated silylene, J. Chem. Phys., 1997, 107, 21, 8829, https://doi.org/10.1063/1.475175 . [all data]

Hostutler, Smith, et al., 1999
Hostutler, D.A.; Smith, T.C.; Li, H.; Clouthier, D.J., The electronic spectrum, molecular structure, and oscillatory fluorescence decay of jet-cooled germylidene (H[sub 2]C[Double Bond][sup 74]Ge), the simplest unsaturated germylene, J. Chem. Phys., 1999, 111, 3, 950, https://doi.org/10.1063/1.479187 . [all data]

Smith, Evans, et al., 2003
Smith, T.C.; Evans, C.J.; Clouthier, D.J., Discovery of the optically forbidden S[sub 1]--S[sub 0] transition of silylidene (H[sub 2]C[Double Bond]Si), J. Chem. Phys., 2003, 118, 4, 1642, https://doi.org/10.1063/1.1531618 . [all data]

Smith, Li, et al., 2001
Smith, T.C.; Li, H.; Clouthier, D.J., The ground state of silylidene (H[sub 2]C=Si), the silicon analog of vinylidene, from stimulated emission pumping and wavelength-resolved fluorescence spectroscopy, J. Chem. Phys., 2001, 114, 20, 9012, https://doi.org/10.1063/1.1368384 . [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]

Izuha, Yamamoto, et al., 1996
Izuha, M.; Yamamoto, S.; Saito, S., Microwave spectrum of silylidene H2CSi, J. Chem. Phys., 1996, 105, 12, 4923, https://doi.org/10.1063/1.472343 . [all data]


Notes

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