Methylenecyclopropene

Formula: C₄H₄
Molecular weight: 52.0746
IUPAC Standard InChI: InChI=1S/C4H4/c1-4-2-3-4/h2-3H,1H2
IUPAC Standard InChIKey: GOSMMPKSWSOPRZ-UHFFFAOYSA-N
CAS Registry Number: 4095-06-1
Chemical structure:
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Gas phase ion energetics data

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

View reactions leading to C₄H₄⁺ (ion structure unspecified)

Quantity	Value	Units	Method	Reference	Comment
Δ_fH°_{(+) ion}	1210.	kJ/mol	N/A	N/A

Ionization energy determinations

IE (eV)	Method	Reference	Comment
8.15 ± 0.03	PE	Staley and Norden, 1989	LL
8.41 ± 0.05	PE	Staley and Norden, 1989	Vertical value; LL

References

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Staley and Norden, 1989
Staley, S.W.; Norden, T.D., Structure and energetics of C₄H₄⁺ in the gas phase. Photoelectron spectrum of methylenecyclopropene, J. Am. Chem. Soc., 1989, 111, 445. [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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