Pyridine, 4-methoxy-

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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

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Individual Reactions

Pyridine, 4-methoxy- = 1-Methyl-4(1H)-pyridinone

By formula: C6H7NO = C6H7NO

Quantity Value Units Method Reference Comment
Δr-37. ± 2.kJ/molCisoBeak, Bonham, et al., 1968liquid phase
Δr-0.8 ± 8.4kJ/molEqkBeak, Bonham, et al., 1968liquid phase; Gas phase isomerization
Δr-37. ± 2.kJ/molEqkBeak and Bonham, 1966liquid phase; At 403 K

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 evaluated as indicated in comments:
HL - Edward P. Hunter and Sharon G. Lias

Data compiled as indicated in comments:
LLK - Sharon G. Lias, Rhoda D. Levin, and Sherif A. Kafafi

View reactions leading to C6H7NO+ (ion structure unspecified)

Quantity Value Units Method Reference Comment
Proton affinity (review)961.7kJ/molN/AHunter and Lias, 1998HL
Quantity Value Units Method Reference Comment
Gas basicity929.8kJ/molN/AHunter and Lias, 1998HL

Ionization energy determinations

IE (eV) Method Reference Comment
9.58 ± 0.02EIGronneberg and Undheim, 1972LLK

References

Go To: Top, Reaction thermochemistry data, Gas phase ion energetics data, Notes

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

Beak, Bonham, et al., 1968
Beak, P.; Bonham, J.; Lee, J.T., Jr., Equilibration studies. The energy differences for some six-membered heterocyclic methyl amide-imidate isomer paris, J. Am. Chem. Soc., 1968, 90, 1569-1582. [all data]

Beak and Bonham, 1966
Beak, P.; Bonham, J., Equilibration studies: the relative chemical binding energies of 2-methoxypyridine-n-methylpyrid-2-one and 4-methoxypyridine-N-methylpyrid-4-one, Chem. Commun., 1966, 631-632. [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]

Gronneberg and Undheim, 1972
Gronneberg, T.; Undheim, K., Mass spectrometry of onium compounds. XI: ionization potentials of hydroxy and mercapto pyridines, Org. Mass Spectrom., 1972, 6, 823. [all data]


Notes

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