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Silane


Gas phase 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.

Quantity Value Units Method Reference Comment
Deltafgas34.31kJ/molReviewChase, 1998Data last reviewed in June, 1976
Quantity Value Units Method Reference Comment
gas,1 bar204.65J/mol*KReviewChase, 1998Data last reviewed in June, 1976

Gas Phase Heat Capacity (Shomate Equation)

Cp° = A + B*t + C*t2 + D*t3 + E/t2
H° − H°298.15= A*t + B*t2/2 + C*t3/3 + D*t4/4 − E/t + F − H
S° = A*ln(t) + B*t + C*t2/2 + D*t3/3 − E/(2*t2) + G
    Cp = heat capacity (J/mol*K)
    H° = standard enthalpy (kJ/mol)
    S° = standard entropy (J/mol*K)
    t = temperature (K) / 1000.

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Temperature (K) 298. - 1300.1300. - 6000.
A 6.06018999.84949
B 139.96324.251530
C -77.88474-0.809269
D 16.240950.053437
E 0.135509-20.39005
F 27.39081-40.54016
G 174.3351266.8015
H 34.3090534.30905
ReferenceChase, 1998Chase, 1998
Comment Data last reviewed in June, 1976 Data last reviewed in June, 1976

Phase change 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.

Antoine Equation Parameters

log10(P) = A − (B / (T + C))
    P = vapor pressure (bar)
    T = temperature (K)

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Temperature (K) A B C Reference Comment
93.8 - 161.74.22228703.9875.352Stull, 1947Coefficents calculated by NIST from author's data.

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

H3Si- + Hydrogen cation = Silane

By formula: H3Si- + H+ = H4Si

Quantity Value Units Method Reference Comment
Deltar1564. ± 8.8kJ/molG+TSGal, Decouzon, et al., 2001gas phase
Deltar1560. ± 8.8kJ/molG+TSWetzel, Salomon, et al., 1989gas phase; value altered from reference due to change in acidity scale
Deltar1559.8 ± 3.5kJ/molD-EANimlos and Ellison, 1986gas phase
Deltar1556. ± 8.8kJ/molG+TSBartmess, Scott, et al., 1979gas phase; value altered from reference due to change in acidity scale
Deltar1564.4kJ/molN/ACheck, Faust, et al., 2001gas phase; MnS-(t); ; «DELTA»S(EA)=5.7
Quantity Value Units Method Reference Comment
Deltar1530. ± 8.4kJ/molIMREGal, Decouzon, et al., 2001gas phase
Deltar1526. ± 8.4kJ/molIMREWetzel, Salomon, et al., 1989gas phase; value altered from reference due to change in acidity scale
Deltar1525.4 ± 3.9kJ/molH-TSNimlos and Ellison, 1986gas phase
Deltar1522. ± 8.4kJ/molIMREBartmess, Scott, et al., 1979gas phase; value altered from reference due to change in acidity scale
Deltar1533.0kJ/molN/ACheck, Faust, et al., 2001gas phase; MnS-(t); ; «DELTA»S(EA)=5.7

Hydrogen anion + Silane = (Hydrogen anion bullet Silane)

By formula: H- + H4Si = (H- bullet H4Si)

Quantity Value Units Method Reference Comment
Deltar79. ± 17.kJ/molIMRBHajdasz, Ho, et al., 1994gas phase
Deltar94. ± 19.kJ/molIMREHajdasz and Squires, 1986gas phase; QCISD Calculation: H-A = 20.2, 99MOC
Quantity Value Units Method Reference Comment
Deltar49. ± 17.kJ/molIMRBHajdasz, Ho, et al., 1994gas phase

Mass spectrum (electron ionization)

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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: NIST Mass Spectrometry Data Center, William E. Wallace, director

Spectrum

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Mass spectrum
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Additional Data

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Owner NIST Mass Spectrometry Data Center
Collection (C) 2014 copyright by the U.S. Secretary of Commerce
on behalf of the United States of America. All rights reserved.
NIST MS number 39

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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: Takehiko Shimanouchi

Symmetry:   Td     Symmetry Number sigma = 12


 Sym.   No   Approximate   Selected Freq.  Infrared   Raman   Comments 
 Species   type of mode   Value   Rating   Value  Phase  Value  Phase

a1 1 Sym str 2187  B  ia 2187.0 S gas
e 2 Deg deform 975  C 974.6 ia gas 978 W gas observed through Coriolis interaction with «nu»4
f2 3 Deg str 2191  A 2190.6 gas
f2 4 Deg deform 914  B 914.2 gas

Source: Shimanouchi, 1972

Notes

SStrong
WWeak
iaInactive
A0~1 cm-1 uncertainty
B1~3 cm-1 uncertainty
C3~6 cm-1 uncertainty

References

Go To: Top, Gas phase thermochemistry data, Phase change data, Reaction thermochemistry data, Mass spectrum (electron ionization), 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.

Chase, 1998
Chase, M.W., Jr., NIST-JANAF Themochemical Tables, Fourth Edition, J. Phys. Chem. Ref. Data, Monograph 9, 1998, 1-1951. [all data]

Stull, 1947
Stull, Daniel R., Vapor Pressure of Pure Substances. Organic and Inorganic Compounds, Ind. Eng. Chem., 1947, 39, 4, 517-540, https://doi.org/10.1021/ie50448a022 . [all data]

Gal, Decouzon, et al., 2001
Gal, J.F.; Decouzon, M.; Maria, P.C.; Gonzalez, A.I.; Mo, O.; Yanez, M.; El Chaouch, S.; Guillemin, J.C., Acidity trends in alpha,beta-unsaturated alkanes, silanes, germanes, and stannanes, J. Am. Chem. Soc., 2001, 123, 26, 6353-6359, https://doi.org/10.1021/ja004079j . [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]

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]

Hajdasz, Ho, et al., 1994
Hajdasz, D.J.; Ho, Y.; Squires, R.R., Gas-Phase Chemistry of Pentacoordinate Silicon Hydrides, J. Am. Chem. Soc., 1994, 116, 23, 10751, https://doi.org/10.1021/ja00102a045 . [all data]

Hajdasz and Squires, 1986
Hajdasz, D.J.; Squires, R.R., Hypervalent silicon hydrides: SiH5-, J. Am. Chem. Soc., 1986, 108, 3139. [all data]

Shimanouchi, 1972
Shimanouchi, T., Tables of Molecular Vibrational Frequencies Consolidated Volume I, National Bureau of Standards, 1972, 1-160. [all data]


Notes

Go To: Top, Gas phase thermochemistry data, Phase change data, Reaction thermochemistry data, Mass spectrum (electron ionization), Vibrational and/or electronic energy levels, References