Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
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All data (experiment and calculated) in the CCCBDB for C₄H₄O₂ (2-Oxetanone, 4-methylene-)

Property		Experiment	Calculated	Comparison
Energies Entropies	Enthalpy 298.15K	x
	Enthalpy 0K
	Energy 0K		212
	Energy 298.15K		208
	Atomization Enthalpy 298.15K	x	151	x
	Atomization Enthalpy 0K		151
	Entropy (298.15K)		142
	Entropy at any temperature		142
	Integrated Heat Capacity		142
	Heat Capacity (Cp)	x	142	x
	Nuclear Repulsion Energy		201
	HOMO-LUMO Energies		198
	Barriers to Internal Rotation		0
Geometries	Cartesians		177
	Internal Coordinates		176
	Products of moments of inertia		197
	Rotational Constants		202
	Point Group		202
Vibrations	Vibrational Frequencies		197
	Vibrational Intensities		206
	Zero-point energies		197
	Vibrational scaling factors
	Anharmonic frequencies and constants		1
	Raman frequencies and intensities		0
Electronic States	Electronic states	x	0
Electrostatics	Atom charges		173
	Dipole	x	178	x
	Quadrupole		172
	Polarizability	x	161	x
Other results	Spin		0
	Number of basis functions		5
	Conformations		1