Silane, methylenebis[trimethyl-

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Condensed 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.

Data compiled by: Eugene S. Domalski and Elizabeth D. Hearing

Quantity Value Units Method Reference Comment
liquid123.3cal/mol*KN/AGuseinov and Karasharli, 1982 
liquid123.30cal/mol*KN/AGuseinov, Karasharli, et al., 1975 

Constant pressure heat capacity of liquid

Cp,liquid (cal/mol*K) Temperature (K) Reference Comment
85.44298.15Guseinov and Karasharli, 1982T = 12 to 300 K.
85.449298.15Guseinov, Karasharli, et al., 1975T = 10 to 300 K. Data given graphically.

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.

Data compiled as indicated in comments:
TRC - Thermodynamics Research Center, NIST Boulder Laboratories, Chris Muzny director
DH - Eugene S. Domalski and Elizabeth D. Hearing
AC - William E. Acree, Jr., James S. Chickos

Quantity Value Units Method Reference Comment
Ttriple140.70KN/AGuseinov and Karasharli, 1982, 2Uncertainty assigned by TRC = 0.02 K; TRC
Quantity Value Units Method Reference Comment
Tc573.9KN/AMcLure and Neville, 1982Uncertainty assigned by TRC = 0.3 K; Visual, TE, PG; TRC
Quantity Value Units Method Reference Comment
Pc19.64atmN/AMcLure and Neville, 1982Uncertainty assigned by TRC = 0.20 atm; Visual, TE, PG; TRC
Quantity Value Units Method Reference Comment
Vc0.644l/molN/AMcLure and Neville, 1982Uncertainty assigned by TRC = 0.0064 l/mol; Visual, TE, PG; TRC
Quantity Value Units Method Reference Comment
ρc1.55mol/lN/AMcLure and Neville, 1982Uncertainty assigned by TRC = 0.0155 mol/l; Visual, TE, PG; TRC

Enthalpy of vaporization

ΔvapH (kcal/mol) Temperature (K) Method Reference Comment
9.6200460.58N/AGuseinov, Karasharli, et al., 1975DH
9.63 ± 0.07365.QMGuseinov, Kuliev, et al., 1975Based on data from 323. to 407. K. See also Guseinov, Karasharli, et al., 1975, 2.; AC

Entropy of vaporization

ΔvapS (cal/mol*K) Temperature (K) Reference Comment
23.66460.58Guseinov, Karasharli, et al., 1975DH

Enthalpy of fusion

ΔfusH (kcal/mol) Temperature (K) Reference Comment
2.6561140.70Guseinov and Karasharli, 1982DH
2.6561140.70Guseinov, Karasharli, et al., 1975DH
2.655140.7Domalski and Hearing, 1996See also Guseinov, Karasharli, et al., 1975, 2.; AC

Entropy of fusion

ΔfusS (cal/mol*K) Temperature (K) Reference Comment
18.88140.70Guseinov and Karasharli, 1982DH
18.88140.70Guseinov, Karasharli, et al., 1975DH

In addition to the Thermodynamics Research Center (TRC) data available from this site, much more physical and chemical property data is available from the following TRC products:


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

C7H19Si2- + Hydrogen cation = Silane, methylenebis[trimethyl-

By formula: C7H19Si2- + H+ = C7H20Si2

Quantity Value Units Method Reference Comment
Δr373.6 ± 2.2kcal/molG+TSRomer, Gatev, et al., 1998gas phase
Δr373.6 ± 4.0kcal/molD-EABrinkman, Berger, et al., 1994gas phase
Quantity Value Units Method Reference Comment
Δr365.9 ± 2.0kcal/molIMRERomer, Gatev, et al., 1998gas phase
Δr365.8 ± 4.1kcal/molH-TSBrinkman, Berger, et al., 1994gas phase

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:
B - John E. Bartmess
LLK - Sharon G. Lias, Rhoda D. Levin, and Sherif A. Kafafi

Ionization energy determinations

IE (eV) Method Reference Comment
9.5PEHosomi and Traylor, 1975Vertical value; LLK

De-protonation reactions

C7H19Si2- + Hydrogen cation = Silane, methylenebis[trimethyl-

By formula: C7H19Si2- + H+ = C7H20Si2

Quantity Value Units Method Reference Comment
Δr373.6 ± 2.2kcal/molG+TSRomer, Gatev, et al., 1998gas phase; B
Δr373.6 ± 4.0kcal/molD-EABrinkman, Berger, et al., 1994gas phase; B
Quantity Value Units Method Reference Comment
Δr365.9 ± 2.0kcal/molIMRERomer, Gatev, et al., 1998gas phase; B
Δr365.8 ± 4.1kcal/molH-TSBrinkman, Berger, et al., 1994gas phase; B

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.
Origin J.TAMAS HUNGARIAN ACADEMY OF SCIENCES, BUDAPEST, HUNGARY
NIST MS number 38105

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Gas Chromatography

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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

Normal alkane RI, non-polar column, temperature ramp

View large format table.

Column type Active phase I Reference Comment
CapillarySqualane793.Szekely, Nefedov, et al., 1967Nitrogen, 5. K/min; Column length: 50. m; Column diameter: 0.25 mm; Tstart: 60. C; Tend: 250. C

Normal alkane RI, non-polar column, custom temperature program

View large format table.

Column type Active phase I Reference Comment
CapillarySqualane788.Szekely, Nefedov, et al., 1967Nitrogen; Column length: 50. m; Column diameter: 0.25 mm; Program: not specified

References

Go To: Top, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, Gas phase ion energetics data, Mass spectrum (electron ionization), Gas Chromatography, Notes

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

Guseinov and Karasharli, 1982
Guseinov, Z.A.; Karasharli, K.A., Heat capacity and thermodynamic functions of hexamethyldisilylmethane, Azerb. Khim. Zhur., 1982, (4), 107-109. [all data]

Guseinov, Karasharli, et al., 1975
Guseinov, Z.A.; Karasharli, K.A.; Dzhafarov, O.I.; Nurullaev, G.G.; Nametkin, N.S.; Gusel'nikov, L.E.; Volnina, F.A.; Burdasov, E.N.; Vdovin, V.M., Thermodynamic parameters of some cyclic and bridging carbosilanes, Dokl.Akad. Nauk, 1975, SSSR 222, 1369-1372. [all data]

Guseinov and Karasharli, 1982, 2
Guseinov, Z.A.; Karasharli, K.A., Heat capacity and thermodynamic functions of hexamethyldisilylmethane, Azerb. Khim. Zh., 1982, 1982, 107. [all data]

McLure and Neville, 1982
McLure, I.A.; Neville, J.F., The critical temperatures and pressures of hexamethyldisilmethylene, octamethylcyclotetrasiloxane, and decamethylcyclpentasiloxane, J. Chem. Thermodyn., 1982, 14, 385-8. [all data]

Guseinov, Kuliev, et al., 1975
Guseinov, A.Z.; Kuliev, A.A.; Karasharli, K.A.; Dzhafarov, O.I., Azerb. Khim. Zh., 1975, 72. [all data]

Guseinov, Karasharli, et al., 1975, 2
Guseinov, A.Z.; Karasharli, K.A.; Dzhafarov, O.I.; Nurullaev, G.G.; Nametkin, N.S.; Gusel'nikov, L.E.; Volnina, E.A.; Burdasov, E.N.; Vdovin, V.N., Dokl. Akad. Nauk SSSR, 1975, 222, 1369. [all data]

Domalski and Hearing, 1996
Domalski, Eugene S.; Hearing, Elizabeth D., Heat Capacities and Entropies of Organic Compounds in the Condensed Phase. Volume III, J. Phys. Chem. Ref. Data, 1996, 25, 1, 1, https://doi.org/10.1063/1.555985 . [all data]

Romer, Gatev, et al., 1998
Romer, B.; Gatev, G.G.; Zhong, M.; Brauman, J.I., Alpha-Stabilization by Silyl and Phosphino Substitution, J. Am. Chem. Soc., 1998, 120, 12, 2919, https://doi.org/10.1021/ja970279s . [all data]

Brinkman, Berger, et al., 1994
Brinkman, E.A.; Berger, S.; Brauman, J.I., alpha-Silyl-substituent stabilization of carbanions and silyl anions, J. Am. Chem. Soc., 1994, 116, 18, 8304, https://doi.org/10.1021/ja00097a042 . [all data]

Hosomi and Traylor, 1975
Hosomi, A.; Traylor, T.G., Studies of interactions of adjacent carbon-metal σ bonds by photoelectron spectroscopy, J. Am. Chem. Soc., 1975, 97, 3682. [all data]

Szekely, Nefedov, et al., 1967
Szekely, T.; Nefedov, O.M.; Garzo, G.; Shiryayav, V.I.; Fritz, D., Gas chromatographic investigation of the thermal decomposition of polydimethylsilylene, Acta Chim. Acad. Sci. Hung., 1967, 54, 3-4, 241-254. [all data]


Notes

Go To: Top, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, Gas phase ion energetics data, Mass spectrum (electron ionization), Gas Chromatography, References