Thiophene, 2-methyl-

Data at NIST subscription sites:

NIST subscription sites provide data under the NIST Standard Reference Data Program, but require an annual fee to access. The purpose of the fee is to recover costs associated with the development of data collections included in such sites. Your institution may already be a subscriber. Follow the links above to find out more about the data in these sites and their terms of usage.


Gas phase thermochemistry data

Go To: Top, Condensed phase thermochemistry data, Reaction thermochemistry 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: Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein

Quantity Value Units Method Reference Comment
Δfgas20.16 ± 0.22kcal/molCcrPennington, Finke, et al., 1956 

Condensed phase thermochemistry data

Go To: Top, Gas phase thermochemistry data, Reaction thermochemistry 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 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
Δfliquid10.66 ± 0.22kcal/molCcrPennington, Finke, et al., 1956Reanalyzed by Cox and Pilcher, 1970, Original value = 10.86 ± 0.21 kcal/mol; ALS
Quantity Value Units Method Reference Comment
Δcliquid-829.82 ± 0.18kcal/molCcrPennington, Finke, et al., 1956Reanalyzed by Cox and Pilcher, 1970, Original value = -829.65 ± 0.18 kcal/mol; ALS
Quantity Value Units Method Reference Comment
liquid52.220cal/mol*KN/APennington, Finke, et al., 1956DH

Constant pressure heat capacity of liquid

Cp,liquid (cal/mol*K) Temperature (K) Reference Comment
35.810298.15Pennington, Finke, et al., 1956T = 12 to 340 K.; DH

Constant pressure heat capacity of solid

Cp,solid (cal/mol*K) Temperature (K) Reference Comment
23.40199.70Carlson and Westrum, 1968glass phase; T = 110 to 200 K. Value is unsmoothed experimental datum.; DH

Reaction thermochemistry data

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry 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: 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

C5H5S- + Hydrogen cation = Thiophene, 2-methyl-

By formula: C5H5S- + H+ = C5H6S

Quantity Value Units Method Reference Comment
Δr379.8 ± 3.1kcal/molG+TSDePuy, Kass, et al., 1988gas phase; Acid: 2-methylthiophene. Between MeOH, EtOH.
Quantity Value Units Method Reference Comment
Δr373.0 ± 3.0kcal/molIMRBDePuy, Kass, et al., 1988gas phase; Acid: 2-methylthiophene. Between MeOH, EtOH.

References

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Reaction thermochemistry data, Notes

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

Pennington, Finke, et al., 1956
Pennington, R.E.; Finke, H.L.; Hubbard, W.N.; Messerly, J.F.; Frow, F.R.; Hossenlopp, I.A.; Waddington, G., The chemical thermodynamic properties of 2-methylthiophene, J. Am. Chem. Soc., 1956, 78, 2055-2060. [all data]

Cox and Pilcher, 1970
Cox, J.D.; Pilcher, G., Thermochemistry of Organic and Organometallic Compounds, Academic Press, New York, 1970, 1-636. [all data]

Carlson and Westrum, 1968
Carlson, H.G.; Westrum, E.F., Jr., Thermal study of the glass-type transformation of 2-methylthiophene, J. Chem. Eng. Data, 1968, 13, 273-274. [all data]

DePuy, Kass, et al., 1988
DePuy, C.H.; Kass, S.R.; Bean, G.P., Formation and Reactions of Heteroaromatic Anions in the Gas Phase, J. Org. Chem., 1988, 53, 19, 4427, https://doi.org/10.1021/jo00254a001 . [all data]


Notes

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Reaction thermochemistry data, References