pentadienide anion


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: John E. Bartmess

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Individual Reactions

C5H7- + Hydrogen cation = 1,3-Pentadiene, (E)-

By formula: C5H7- + H+ = C5H8

Quantity Value Units Method Reference Comment
Δr1545. ± 5.0kJ/molD-EAZimmerman, Gygax, et al., 1978gas phase; Acid: 1,4-pentadiene. (Z)-1,3-pentadiene is 7.0 kcal/mol more stable(weaker acid)
Quantity Value Units Method Reference Comment
Δr1525. ± 7.9kJ/molH-TSZimmerman, Gygax, et al., 1978gas phase; Acid: 1,4-pentadiene. (Z)-1,3-pentadiene is 7.0 kcal/mol more stable(weaker acid)

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 compiled by: John E. Bartmess

Electron affinity of neutral species

EAneutral (eV) Method Reference Comment
0.910 ± 0.030PDZimmerman, Gygax, et al., 1978Acid: 1,4-pentadiene. (Z)-1,3-pentadiene is 7.0 kcal/mol more stable(weaker acid)

Protonation reactions

C5H7- + Hydrogen cation = 1,3-Pentadiene, (E)-

By formula: C5H7- + H+ = C5H8

Quantity Value Units Method Reference Comment
Δr1545. ± 5.0kJ/molD-EAZimmerman, Gygax, et al., 1978gas phase; Acid: 1,4-pentadiene. (Z)-1,3-pentadiene is 7.0 kcal/mol more stable(weaker acid)
Quantity Value Units Method Reference Comment
Δr1525. ± 7.9kJ/molH-TSZimmerman, Gygax, et al., 1978gas phase; Acid: 1,4-pentadiene. (Z)-1,3-pentadiene is 7.0 kcal/mol more stable(weaker acid)

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.

Zimmerman, Gygax, et al., 1978
Zimmerman, A.H.; Gygax, R.; Brauman, J.I., Electron photodetachment spectroscopy of polyene anions. Electron affinities of pentadienyl and heptatrienyl radicals, J. Am. Chem. Soc., 1978, 100, 5595. [all data]


Notes

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