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 C₅H₈ (Cyclobutane, methylene-)

Property		Experiment	Calculated	Comparison
Energies Entropies	Enthalpy 298.15K	x
	Enthalpy 0K	x
	Energy 0K		253
	Energy 298.15K		245
	Atomization Enthalpy 298.15K	x	178	x
	Atomization Enthalpy 0K	x	179	x
	Entropy (298.15K)	x	175	x
	Entropy at any temperature		175
	Integrated Heat Capacity	x	175	x
	Heat Capacity (Cp)	x	175	x
	Nuclear Repulsion Energy		242
	HOMO-LUMO Energies		225
	Barriers to Internal Rotation		0
Geometries	Cartesians		216
	Internal Coordinates	x	0	x
	Products of moments of inertia	x	236	x
	Rotational Constants	x	241	x
	Point Group		242
Vibrations	Vibrational Frequencies		237
	Vibrational Intensities		253
	Zero-point energies		237
	Vibrational scaling factors
	Anharmonic frequencies and constants		1
	Raman frequencies and intensities		4
Electronic States	Electronic states	x	0
Electrostatics	Atom charges		184
	Dipole	x	195	x
	Quadrupole	x	186	x
	Polarizability		170
Other results	Spin		0
	Number of basis functions		6
	Conformations		1