Tetramethyl orthocarbonate


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.

Data compiled by: Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein

Quantity Value Units Method Reference Comment
Δfgas-173.80 ± 0.36kcal/molCmWiberg and Squires, 1979Hydrolysis
Δfgas-173.9kcal/molCmHine and Klueppet, 1974 

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: Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein

Quantity Value Units Method Reference Comment
Δfliquid-183.34 ± 0.31kcal/molCmWiberg and Squires, 1979Hydrolysis
Δfliquid-183.4kcal/molCmHine and Klueppet, 1974 

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:
BS - Robert L. Brown and Stephen E. Stein
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
DRB - Donald R. Burgess, Jr.
AC - William E. Acree, Jr., James S. Chickos

Quantity Value Units Method Reference Comment
Tboil387.2KN/AWeast and Grasselli, 1989BS
Quantity Value Units Method Reference Comment
Δvap9.56 ± 0.18kcal/molEWiberg and Squires, 1979Hydrolysis; ALS
Δvap9.54kcal/molN/AWiberg and Squires, 1979DRB
Δvap9.56kcal/molVHine and Klueppet, 1974ALS
Δvap9.49kcal/molN/AHine and Klueppet, 1974DRB

Enthalpy of vaporization

ΔvapH (kcal/mol) Temperature (K) Reference Comment
9.85319.Thomas, Smith, et al., 2007Based on data from 304. to 387. K.; AC

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: Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein

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

Tetramethyl orthocarbonate + Water = Carbonic acid, dimethyl ester + 2Methyl Alcohol

By formula: C5H12O4 + H2O = C3H6O3 + 2CH4O

Quantity Value Units Method Reference Comment
Δr7.521 ± 0.011kcal/molCmWiberg, 1980liquid phase; solvent: Water; Hydroysis
Δr-7.521 ± 0.011kcal/molCmWiberg and Squires, 1979liquid phase; solvent: Water; Hydrolysis
Δr-7.43 ± 0.41kcal/molCmHine and Klueppet, 1974liquid phase

References

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

Wiberg and Squires, 1979
Wiberg, K.B.; Squires, R.R., A microprocessor-controlled system for precise measurement of temperature changes. Determination of the enthalpies of hydrolysis of some polyoxygenated hydrocarbons, J. Chem. Thermodyn., 1979, 11, 773-786. [all data]

Hine and Klueppet, 1974
Hine, J.; Klueppet, A.W., Structural effects on rates and equilibria. XVIII. Thermodynamic stability of ortho esters, J. Am. Chem. Soc., 1974, 96, 2924-2929. [all data]

Weast and Grasselli, 1989
CRC Handbook of Data on Organic Compounds, 2nd Editon, Weast,R.C and Grasselli, J.G., ed(s)., CRC Press, Inc., Boca Raton, FL, 1989, 1. [all data]

Thomas, Smith, et al., 2007
Thomas, Leo H.; Smith, Harry; Davies, Gwyn H., Vapour pressures, molar entropies of vaporisation and liquid-state conformation of alkoxides, J. Chem. Technol. Biotechnol., 2007, 30, 1, 476-480, https://doi.org/10.1002/jctb.503300160 . [all data]

Wiberg, 1980
Wiberg, K.B., Energies of organic compounds, Rept. DOE-E(11-1)4060 Prepared for US Dept. of Energy by Yale Univ., New Haven, CT. Avail. NTIS, 1980, 1-24. [all data]


Notes

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