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Methylal

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Gas phase thermochemistry data

Go To: Top, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, IR Spectrum, Mass spectrum (electron ionization), References, Notes

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:
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
GT - Glushko Thermocenter, Russian Academy of Sciences, Moscow

Quantity Value Units Method Reference Comment
Deltafgas-83.21 ± 0.19kcal/molCmPilcher and Fletcher, 1969ALS
Quantity Value Units Method Reference Comment
Deltacgas-472.20 ± 0.18kcal/molCmPilcher and Fletcher, 1969Corresponding «DELTA»fgas = -83.21 kcal/mol (simple calculation by NIST; no Washburn corrections); ALS
Quantity Value Units Method Reference Comment
gas80.24 ± 0.15cal/mol*KN/AMcEachern D.M., 1964GT

Condensed phase thermochemistry data

Go To: Top, Gas phase thermochemistry data, Phase change data, Reaction thermochemistry data, IR Spectrum, Mass spectrum (electron ionization), 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: Eugene S. Domalski and Elizabeth D. Hearing

Quantity Value Units Method Reference Comment
liquid58.320cal/mol*KN/AMcEachern and Kilpatrick, 1964 

Constant pressure heat capacity of liquid

Cp,liquid (cal/mol*K) Temperature (K) Reference Comment
38.580298.15McEachern and Kilpatrick, 1964T = 15 to 300 K.
39.10298.von Reis, 1881T = 289 to 323 K.

Phase change data

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Reaction thermochemistry data, IR Spectrum, Mass spectrum (electron ionization), References, Notes

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
TRC - Thermodynamics Research Center, NIST Boulder Laboratories, Chris Muzny, director
AC - William E. Acree, Jr., James S. Chickos
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
DH - Eugene S. Domalski and Elizabeth D. Hearing

Quantity Value Units Method Reference Comment
Tboil315.3 ± 0.5KAVGN/AAverage of 10 values; Individual data points
Quantity Value Units Method Reference Comment
Tfus168.KN/ATimmermans, 1935Uncertainty assigned by TRC = 2. K; TRC
Tfus168.35KN/ATimmermans, 1934Uncertainty assigned by TRC = 0.5 K; TRC
Tfus168.15KN/ATimmermans and Martin, 1928Uncertainty assigned by TRC = 0.4 K; TRC
Tfus168.35KN/ATimmermans, 1911Uncertainty assigned by TRC = 0.3 K; TRC
Quantity Value Units Method Reference Comment
Ttriple168.03KN/AWilhoit, Chao, et al., 1985Uncertainty assigned by TRC = 0.05 K; TRC
Ttriple168.01KN/AMcEachern and Kilpatrick, 1964, 2Uncertainty assigned by TRC = 0.02 K; TRC
Quantity Value Units Method Reference Comment
Tc480.6KN/AKobe and Mathews, 1970Uncertainty assigned by TRC = 1. K; TRC
Tc488.4KN/ABourgou, 1924Uncertainty assigned by TRC = 6. K; TRC
Tc496.8KN/APawlewski, 1883Uncertainty assigned by TRC = 10. K; TRC
Quantity Value Units Method Reference Comment
Pc38.98atmN/AKobe and Mathews, 1970Uncertainty assigned by TRC = 0.6999 atm; TRC
Quantity Value Units Method Reference Comment
rhoc4.69mol/lN/AKobe and Mathews, 1970Uncertainty assigned by TRC = 0.39 mol/l; TRC
Quantity Value Units Method Reference Comment
Deltavap7.07kcal/molN/AAlbert, Hahnenstein, et al., 2001Based on data from 273. - 357. K.; AC
Deltavap6.904 ± 0.050kcal/molVMcEachern and Kilpatrick, 1964, 3ALS

Enthalpy of vaporization

DeltavapH (kcal/mol) Temperature (K) Method Reference Comment
6.9039298.15N/AMcEachern and Kilpatrick, 1964P = 53.14 kPa; DH
7.46288.AStephenson and Malanowski, 1987Based on data from 273. - 316. K.; AC
7.12288.AStephenson and Malanowski, 1987Based on data from 273. - 318. K.; AC
7.24305.N/ABrazhnikov, Peshchenko, et al., 1976Based on data from 296. - 314. K.; AC
7.19288.N/ANicolini and Laffitte, 1949Based on data from 273. - 308. K.; AC

Entropy of vaporization

DeltavapS (cal/mol*K) Temperature (K) Reference Comment
23.2298.15McEachern and Kilpatrick, 1964P; DH

Antoine Equation Parameters

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

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Temperature (K) A B C Reference Comment
273. - 308.4.031041068.35-50.409Nicolini and Laffitte, 1949, 2Coefficents calculated by NIST from author's data.

Enthalpy of fusion

DeltafusH (kcal/mol) Temperature (K) Reference Comment
1.9913168.01McEachern and Kilpatrick, 1964DH
1.99168.Domalski and Hearing, 1996AC

Entropy of fusion

DeltafusS (cal/mol*K) Temperature (K) Reference Comment
11.85168.01McEachern and Kilpatrick, 1964DH

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

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, IR Spectrum, Mass spectrum (electron ionization), References, Notes

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:
M - Michael M. Meot-Ner (Mautner) and Sharon G. Lias
ALS - 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

NH4+ + Methylal = (NH4+ bullet Methylal)

By formula: H4N+ + C3H8O2 = (H4N+ bullet C3H8O2)

Quantity Value Units Method Reference Comment
Deltar29.1kcal/molPHPMSMeot-Ner (Mautner), Sieck, et al., 1996gas phase; M
Quantity Value Units Method Reference Comment
Deltar25.2cal/mol*KPHPMSMeot-Ner (Mautner), Sieck, et al., 1996gas phase; M

Methylal + Water = Formaldehyde + 2Methyl Alcohol

By formula: C3H8O2 + H2O = CH2O + 2CH4O

Quantity Value Units Method Reference Comment
Deltar18.45 ± 0.12kcal/molCmBirley and Skinner, 1970liquid phase; Heat of hydrolysis; ALS

IR Spectrum

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

Data compiled by: Coblentz Society, Inc.

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


Mass spectrum (electron ionization)

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, IR Spectrum, 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: 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 372

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References

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

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

Pilcher and Fletcher, 1969
Pilcher, G.; Fletcher, R.A., Measurements of heats of combustion by flame calorimetry. Part 5.-Dimethoxymethane, 1,1-Dimethoxyethane, Trans. Faraday Soc., 1969, 65, 2326-2330. [all data]

McEachern D.M., 1964
McEachern D.M., Jr., Entropy and related thermodynamic properties of dimethoxymethane, J. Chem. Phys., 1964, 41, 3127-3131. [all data]

McEachern and Kilpatrick, 1964
McEachern, D.M., Jr.; Kilpatrick, J.E., Entropy and related thermodynamic properties of dimethoxymethane, J. Chem. Phys., 1964, 41, 3127-3131. [all data]

von Reis, 1881
von Reis, M.A., Die specifische Wärme flüssiger organischer Verbindungen und ihre Beziehung zu deren Moleculargewicht, Ann. Physik [3], 1881, 13, 447-464. [all data]

Timmermans, 1935
Timmermans, J., Researches in Stoichiometry. I. The Heat of Fusion of Organic Compounds., Bull. Soc. Chim. Belg., 1935, 44, 17-40. [all data]

Timmermans, 1934
Timmermans, J., Theory of Concentrated Solutions XII., Bull. Soc. Chim. Belg., 1934, 43, 626. [all data]

Timmermans and Martin, 1928
Timmermans, J.; Martin, F., Study of the Physical Constants of Twenty Organic Compounds of the Physical Constants of Twenty Organic Compounds, J. Chim. Phys. Phys.-Chim. Biol., 1928, 25, 411. [all data]

Timmermans, 1911
Timmermans, J., Researches on the freezing point of organic liquid compounds, Bull. Soc. Chim. Belg., 1911, 25, 300. [all data]

Wilhoit, Chao, et al., 1985
Wilhoit, R.C.; Chao, J.; Hall, K.R., Thermodynamic Properties of Key Organic Compounds in the Carbon Range C1 to C4. Part 1. Properties of Condensed Phases, J. Phys. Chem. Ref. Data, 1985, 14, 1. [all data]

McEachern and Kilpatrick, 1964, 2
McEachern, D.M.; Kilpatrick, J.E., Entropy and related thermodynamic properties of dimethoxymethane., J. Chem. Phys., 1964, 41, 3127-31. [all data]

Kobe and Mathews, 1970
Kobe, K.A.; Mathews, J.F., Critical Properties and Vapor Pressures of Some Organic Nitrogen and Oxygen Compounds, J. Chem. Eng. Data, 1970, 15, 182. [all data]

Bourgou, 1924
Bourgou, A., Contribution a l'Etude du Methylal comme Solvant, Bull. Soc. Chim. Belg., 1924, 33, 101-115. [all data]

Pawlewski, 1883
Pawlewski, B., Critical temperatures of some liquids, Ber. Dtsch. Chem. Ges., 1883, 16, 2633-36. [all data]

Albert, Hahnenstein, et al., 2001
Albert, Michael; Hahnenstein, Immanuel; Hasse, Hans; Maurer, Gerd, Vapor-Liquid and Liquid-Liquid Equilibria in Binary and Ternary Mixtures of Water, Methanol, and Methylal, J. Chem. Eng. Data, 2001, 46, 4, 897-903, https://doi.org/10.1021/je000352l . [all data]

McEachern and Kilpatrick, 1964, 3
McEachern, D.M., Jr.; Kilpatrick, J.E., Entropy and related thermodynamic properties of dimethoxymethane, Ber. Bunsenges. Phys. Chem., 1964, 41, 3127. [all data]

Stephenson and Malanowski, 1987
Stephenson, Richard M.; Malanowski, Stanislaw, Handbook of the Thermodynamics of Organic Compounds, 1987, https://doi.org/10.1007/978-94-009-3173-2 . [all data]

Brazhnikov, Peshchenko, et al., 1976
Brazhnikov, M.M.; Peshchenko, A.D.; Ral'ko, O.V., Zh. Prikl. Khim. (Leningrad), 1976, 49, 1041. [all data]

Nicolini and Laffitte, 1949
Nicolini, E.; Laffitte, P., Compt. Rend., 1949, 229, 757. [all data]

Nicolini and Laffitte, 1949, 2
Nicolini, E.; Laffitte, P., Tensions de Vapeur de Quelques Liquides Organiques Purs, Compt. Rend., 1949, 229, 757-759. [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]

Meot-Ner (Mautner), Sieck, et al., 1996
Meot-Ner (Mautner), M.; Sieck, L.W.; Liebman, J.F.; Scheiner, S., Complexing of the Ammonium Ion by Polyethers. Comparative Complexing Thermochemistry of Ammonium, Hydronium, and Alkali Cations, J. Phys. Chem., 1996, 100, 16, 6445, https://doi.org/10.1021/jp9514943 . [all data]

Birley and Skinner, 1970
Birley, G.I.; Skinner, H.A., Enthalpies of hydrolysis of dimethoxymethane and 1,1-dimethoxyethane, Trans. Faraday Soc., 1970, 66, 791-793. [all data]


Notes

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