Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
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Calc. vs exp. Bad Vib. HF vs MP2 Bad scale factors Low excited states Oddities NaCN Is not linear FAQ Help Units Choose Units Energy Bond length Rotational Constant Moment of Inertia Dipole and Quadrupole Polarizability Explanations Hartree cm-1 Debye Credits Just show me Show me a calculated geometry Summary Using older interface Limit Basis sets Method options List Recent molecules Choose a few Molecules Number of atoms By heavy atoms Diatomics InChI Deuterated Dimers Geometry Point group Point group count Bonds types Isodesmic reactions Bad point group Multiple conformers, states Vibrations Big anharmonicity Energy Enthalpy at 0 Kelvin Similar molecules Similar Isomers Cis/trans Tautomers Multiple conformers, states Ions, Dipoles, etc. List Ions Ionization changes point group Dipole Quadrupole Polarizability Proton Affinities Index of CCCBDB Feedback Error form Wants
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All data (experiment and calculated) in the CCCBDB for Na₂O (disodium monoxide)

Property		Experiment	Calculated	Comparison
Energies Entropies	Enthalpy 298.15K
	Enthalpy 0K
	Energy 0K		1051
	Energy 298.15K		741
	Atomization Enthalpy 298.15K		2
	Atomization Enthalpy 0K		23
	Entropy (298.15K)		0
	Entropy at any temperature		0
	Integrated Heat Capacity		0
	Heat Capacity (Cp)		0
	Nuclear Repulsion Energy		1026
	HOMO-LUMO Energies		950
	Barriers to Internal Rotation		0
Geometries	Cartesians		997
	Internal Coordinates		997
	Products of moments of inertia		1003
	Rotational Constants		1016
	Point Group		1061
Vibrations	Vibrational Frequencies		1027
	Vibrational Intensities		1324
	Zero-point energies		1027
	Vibrational scaling factors
	Anharmonic frequencies and constants
	Raman frequencies and intensities		10
Electronic States	Electronic states	x	0
Electrostatics	Atom charges		644
	Dipole		822
	Quadrupole		723
	Polarizability		742
Other results	Spin		0
	Number of basis functions		60
	Conformations		2	x