Cyclopropenylidene

Formula: C₃H₂
Molecular weight: 38.0480
IUPAC Standard InChI: InChI=1S/C3H2/c1-2-3-1/h1-2H
IUPAC Standard InChIKey: VVLPCWSYZYKZKR-UHFFFAOYSA-N
CAS Registry Number: 16165-40-5
Chemical structure:
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Gas phase ion energetics data

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

Data compiled as indicated in comments:
LL - Sharon G. Lias and Joel F. Liebman

View reactions leading to C₃H₂⁺ (ion structure unspecified)

Quantity	Value	Units	Method	Reference	Comment
Proton affinity (review)	227.3	kcal/mol	N/A	Hunter and Lias, 1998	HL
Quantity	Value	Units	Method	Reference	Comment
Gas basicity	218.9	kcal/mol	N/A	Hunter and Lias, 1998	HL
Quantity	Value	Units	Method	Reference	Comment
Δ_fH°_{(+) ion}	281. ± 3.	kcal/mol	N/A	N/A

Ionization energy determinations

IE (eV)	Method	Reference	Comment
9.15 ± 0.03	PI	Clauberg, Minsek, et al., 1992	LL

References

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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]

Clauberg, Minsek, et al., 1992
Clauberg, H.; Minsek, D.W.; Chen, P., Mass and photoelectron spectroscopy of C₃H₂. ΔH_f of singlet carbenes deviate from additivity by their singlet-triplet gaps, J. Am. Chem. Soc., 1992, 114, 99. [all data]

Notes

Go To: Top, Gas phase ion energetics data, References

Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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