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 CH₄^- (Methane anion)

Property		Experiment	Calculated	Comparison
Energies Entropies	Enthalpy 298.15K
	Enthalpy 0K
	Energy 0K		828
	Energy 298.15K		398
	Atomization Enthalpy 298.15K		0
	Atomization Enthalpy 0K		0
	Entropy (298.15K)		0
	Entropy at any temperature		0
	Integrated Heat Capacity		0
	Heat Capacity (Cp)		0
	Nuclear Repulsion Energy		477
	HOMO-LUMO Energies		418
	Barriers to Internal Rotation		0
Geometries	Cartesians		477
	Internal Coordinates		477
	Products of moments of inertia		469
	Rotational Constants		477
	Point Group		478
Vibrations	Vibrational Frequencies		448
	Vibrational Intensities		391
	Zero-point energies		448
	Vibrational scaling factors
	Anharmonic frequencies and constants
	Raman frequencies and intensities		0
Electronic States	Electronic states	x	0
Electrostatics	Atom charges		268
	Dipole		380
	Quadrupole		306
	Polarizability		318
Other results	Spin		477
	Number of basis functions		132
	Conformations		2	x