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 CCH₂ (vinylidene)

Property		Experiment	Calculated	Comparison
Energies Entropies	Enthalpy 298.15K
	Enthalpy 0K
	Energy 0K		693
	Energy 298.15K		672
	Atomization Enthalpy 298.15K		205
	Atomization Enthalpy 0K		204
	Entropy (298.15K)		208
	Entropy at any temperature		208
	Integrated Heat Capacity		208
	Heat Capacity (Cp)		208
	Nuclear Repulsion Energy		670
	HOMO-LUMO Energies		660
	Barriers to Internal Rotation		0
Geometries	Cartesians		667
	Internal Coordinates		667
	Products of moments of inertia		671
	Rotational Constants		682
	Point Group		684
Vibrations	Vibrational Frequencies	fun.	687	x
	Vibrational Intensities		828
	Zero-point energies		687
	Vibrational scaling factors
	Anharmonic frequencies and constants		1
	Raman frequencies and intensities		10
Electronic States	Electronic states	x	414
Electrostatics	Atom charges		404
	Dipole		480
	Quadrupole		442
	Polarizability		451
Other results	Spin		401
	Number of basis functions		72
	Conformations		1