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 CH₃^- (methyl anion)

Property		Experiment	Calculated	Comparison
Energies Entropies	Enthalpy 298.15K
	Enthalpy 0K
	Energy 0K		604
	Energy 298.15K		580
	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		596
	HOMO-LUMO Energies		510
	Barriers to Internal Rotation		0
Geometries	Cartesians		579
	Internal Coordinates		579
	Products of moments of inertia		583
	Rotational Constants		592
	Point Group		601
Vibrations	Vibrational Frequencies		586
	Vibrational Intensities		698
	Zero-point energies		586
	Vibrational scaling factors
	Anharmonic frequencies and constants
	Raman frequencies and intensities		5
Electronic States	Electronic states	x	0
Electrostatics	Atom charges		342
	Dipole		422
	Quadrupole		353
	Polarizability		383
Other results	Spin		5
	Number of basis functions		104
	Conformations		1