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 KCN (Potassium cyanide)

Property		Experiment	Calculated	Comparison
Energies Entropies	Enthalpy 298.15K	x
	Enthalpy 0K
	Energy 0K		1086
	Energy 298.15K		808
	Atomization Enthalpy 298.15K		0
	Atomization Enthalpy 0K		0
	Entropy (298.15K)	x	0	x
	Entropy at any temperature		0
	Integrated Heat Capacity		0
	Heat Capacity (Cp)		0
	Nuclear Repulsion Energy		1055
	HOMO-LUMO Energies		974
	Barriers to Internal Rotation		730
Geometries	Cartesians		1080
	Internal Coordinates		1080
	Products of moments of inertia		1063
	Rotational Constants		1080
	Point Group		1090
Vibrations	Vibrational Frequencies	fun.	1069	x
	Vibrational Intensities		974
	Zero-point energies		1069
	Vibrational scaling factors
	Anharmonic frequencies and constants
	Raman frequencies and intensities		3
Electronic States	Electronic states	x	0
Electrostatics	Atom charges		644
	Dipole		831
	Quadrupole		705
	Polarizability		749
Other results	Spin		0
	Number of basis functions		60
	Conformations		3	x