Di-tert-Butyl ether
- Formula: C8H18O
- Molecular weight: 130.2279
- IUPAC Standard InChIKey: AQEFLFZSWDEAIP-UHFFFAOYSA-N
- CAS Registry Number: 6163-66-2
- Chemical structure:
This structure is also available as a 2d Mol file or as a computed 3d SD file
The 3d structure may be viewed using Java or Javascript. - Other names: Propane, 2,2'-oxybis[2-methyl-; tert-Butyl ether; 2,2'-Oxybis-2-methyl-propane; (tert-C4H9)2O; 1,1'-Oxybis(1,1-dimethylethane)
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Condensed phase thermochemistry data
Go To: Top, Phase change data, Gas phase ion energetics data, 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
DH - Eugene S. Domalski and Elizabeth D. Hearing
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔfH°liquid | -95.23 ± 0.17 | kcal/mol | Ccr | Steele, Chirico, et al., 1996 | ALS |
ΔfH°liquid | -95.51 ± 0.27 | kcal/mol | Ccb | Fenwick, Harrop, et al., 1975 | ALS |
ΔfH°liquid | -96.1 | kcal/mol | Ccb | Smutny and Bondi, 1961 | Heat of combustion corrected for pressure; ALS |
Quantity | Value | Units | Method | Reference | Comment |
ΔcH°liquid | -1272.01 ± 0.15 | kcal/mol | Ccr | Steele, Chirico, et al., 1996 | Corresponding ΔfHºliquid = -95.232 kcal/mol (simple calculation by NIST; no Washburn corrections); ALS |
ΔcH°liquid | -1271.74 | kcal/mol | Ccb | Fenwick, Harrop, et al., 1975 | Corresponding ΔfHºliquid = -95.507 kcal/mol (simple calculation by NIST; no Washburn corrections); ALS |
ΔcH°liquid | -1271.1 ± 0.25 | kcal/mol | Ccb | Smutny and Bondi, 1961 | Heat of combustion corrected for pressure; Corresponding ΔfHºliquid = -96.1 kcal/mol (simple calculation by NIST; no Washburn corrections); ALS |
Constant pressure heat capacity of liquid
Cp,liquid (cal/mol*K) | Temperature (K) | Reference | Comment |
---|---|---|---|
65.99 | 298.15 | Fenwick, Harrop, et al., 1975, 2 | DH |
Phase change data
Go To: Top, Condensed phase thermochemistry data, Gas phase ion energetics data, 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:
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
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
Tboil | 379.9 | K | N/A | Erickson and Ashton, 1941 | Uncertainty assigned by TRC = 0.8 K; TRC |
Quantity | Value | Units | Method | Reference | Comment |
Tc | 555. | K | N/A | Steele, Chirico, et al., 1996 | Uncertainty assigned by TRC = 2. K; TRC |
Quantity | Value | Units | Method | Reference | Comment |
Pc | 23.93 | atm | N/A | Steele, Chirico, et al., 1996 | Uncertainty assigned by TRC = 1.48 atm; from extraploation of obs. vapor pressures to Tc; TRC |
Quantity | Value | Units | Method | Reference | Comment |
ρc | 1.995 | mol/l | N/A | Steele, Chirico, et al., 1996 | Uncertainty assigned by TRC = 0.092 mol/l; TRC |
Quantity | Value | Units | Method | Reference | Comment |
ΔvapH° | 9.01 ± 0.07 | kcal/mol | EB | Steele, Chirico, et al., 1996 | Based on data from 290. to 386. K.; AC |
ΔvapH° | 8.89 | kcal/mol | N/A | Ambrose, Ellender, et al., 1976 | Based on data from 289. to 382. K.; AC |
ΔvapH° | 9.0 ± 0.2 | kcal/mol | C | Fenwick, Harrop, et al., 1975 | ALS |
ΔvapH° | 8.99 ± 0.02 | kcal/mol | C | Fenwick, Harrop, et al., 1975 | AC |
ΔvapH° | 9.0 | kcal/mol | V | Smutny and Bondi, 1961 | Heat of combustion corrected for pressure; ALS |
Enthalpy of vaporization
ΔvapH (kcal/mol) | Temperature (K) | Method | Reference | Comment |
---|---|---|---|---|
8.91 | 304. | A | Stephenson and Malanowski, 1987 | Based on data from 289. to 382. K. See also Ambrose, Ellender, et al., 1976.; AC |
9.25 | 292. | A | Stephenson and Malanowski, 1987 | Based on data from 277. to 382. K. See also Smutny and Bondi, 1961.; AC |
7.55 | 380. | N/A | Ambrose, Ellender, et al., 1976 | Based on data from 289. to 382. K.; AC |
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 |
---|---|---|---|---|---|
277. to 382. | 3.70877 | 1157.714 | -70.097 | Smutny and Bondi, 1961 | Coefficents calculated by NIST from author's data. |
Gas phase ion energetics data
Go To: Top, Condensed phase thermochemistry data, Phase change data, 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 evaluated as indicated in comments:
HL - Edward P. Hunter and Sharon G. Lias
L - Sharon G. Lias
Data compiled as indicated in comments:
LLK - Sharon G. Lias, Rhoda D. Levin, and Sherif A. Kafafi
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
IE (evaluated) | 8.88 ± 0.06 | eV | N/A | N/A | L |
Quantity | Value | Units | Method | Reference | Comment |
Proton affinity (review) | 212.1 | kcal/mol | N/A | Hunter and Lias, 1998 | HL |
Quantity | Value | Units | Method | Reference | Comment |
Gas basicity | 205.5 | kcal/mol | N/A | Hunter and Lias, 1998 | HL |
Ionization energy determinations
IE (eV) | Method | Reference | Comment |
---|---|---|---|
8.81 | PE | Brown, 1975 | LLK |
8.94 ± 0.01 | PE | Cocksey, Eland, et al., 1971 | LLK |
Mass spectrum (electron ionization)
Go To: Top, Condensed phase thermochemistry data, Phase change data, Gas phase ion energetics data, 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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Additional Data
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Due to licensing restrictions, this spectrum cannot be downloaded.
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 | D.HENNEBERG, MAX-PLANCK INSTITUTE, MULHEIM, WEST GERMANY |
NIST MS number | 60540 |
References
Go To: Top, Condensed phase thermochemistry data, Phase change data, Gas phase ion energetics data, 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.
Steele, Chirico, et al., 1996
Steele, W.V.; Chirico, R.D.; Knipmeyer, S.E.; Nguyen, A.; Smith, N.K.,
Thermodynamic properties and ideal-gas enthalpies of formation for butyl vinyl ether, 1,2-dimethoxyethane, methyl glycolate, bicyclo[2.2.1]hept-2-ene, 5-vinylbicyclo[2.2.1]hept-2-ene, trans-azobenzene, butyl acrylate, di-tert-butyl ether, and hexane-1,6-diol,
J. Chem. Eng. Data, 1996, 41, 1285-1302. [all data]
Fenwick, Harrop, et al., 1975
Fenwick, J.O.; Harrop, D.; Head, A.J.,
Thermodynamic properties of organic oxygen compounds. 41. Enthalpies of formation of eight ethers,
J. Chem. Thermodyn., 1975, 7, 943-954. [all data]
Smutny and Bondi, 1961
Smutny, E.J.; Bondi, A.,
Di-t-butyl ether: Strain energy and physical properties,
J. Phys. Chem., 1961, 65, 546-550. [all data]
Fenwick, Harrop, et al., 1975, 2
Fenwick, J.O.; Harrop, D.; Head, A.J.,
Thermodynamic properties of organic oxygen compounds. 41. Enthalpies of formation of eight ethers,
J. Chem. Thermodynam., 1975, 7, 944-954. [all data]
Erickson and Ashton, 1941
Erickson, J.L.E.; Ashton, W.H.,
Di-tertiary Butyl Ether,
J. Am. Chem. Soc., 1941, 63, 1769. [all data]
Ambrose, Ellender, et al., 1976
Ambrose, D.; Ellender, J.H.; Sprake, C.H.S.; Townsend, R.,
Thermodynamic properties of organic oxygen compounds XLIII. Vapour pressures of some ethers,
The Journal of Chemical Thermodynamics, 1976, 8, 2, 165-178, https://doi.org/10.1016/0021-9614(76)90090-2
. [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]
Hunter and Lias, 1998
Hunter, E.P.; Lias, S.G.,
Evaluated Gas Phase Basicities and Proton Affinities of Molecules: An Update,
J. Phys. Chem. Ref. Data, 1998, 27, 3, 413-656, https://doi.org/10.1063/1.556018
. [all data]
Brown, 1975
Brown, R.S.,
A photoelectron investigation of the peroxide bond,
Can. J. Chem., 1975, 53, 3439. [all data]
Cocksey, Eland, et al., 1971
Cocksey, B.J.; Eland, J.H.D.; Danby, C.J.,
The effect of alkyl substitution on ionisation potential,
J. Chem. Soc., 1971, (B), 790. [all data]
Notes
Go To: Top, Condensed phase thermochemistry data, Phase change data, Gas phase ion energetics data, Mass spectrum (electron ionization), References
- Symbols used in this document:
Cp,liquid Constant pressure heat capacity of liquid IE (evaluated) Recommended ionization energy Pc Critical pressure Tboil Boiling point Tc Critical temperature ΔcH°liquid Enthalpy of combustion of liquid at standard conditions ΔfH°liquid Enthalpy of formation of liquid at standard conditions ΔvapH Enthalpy of vaporization ΔvapH° Enthalpy of vaporization at standard conditions ρc Critical density - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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