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 C₂H₄⁺ (Ethylene cation)

Property		Experiment	Calculated	Comparison
Energies Entropies	Enthalpy 298.15K
	Enthalpy 0K
	Energy 0K		887
	Energy 298.15K		616
	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		858
	HOMO-LUMO Energies		747
	Barriers to Internal Rotation		266
Geometries	Cartesians		873
	Internal Coordinates		873
	Products of moments of inertia		851
	Rotational Constants		862
	Point Group		880
Vibrations	Vibrational Frequencies	fun.	869	x
	Vibrational Intensities		958
	Zero-point energies		869
	Vibrational scaling factors
	Anharmonic frequencies and constants
	Raman frequencies and intensities		10
Electronic States	Electronic states	x	0
Electrostatics	Atom charges		547
	Dipole		659
	Quadrupole		585
	Polarizability		580
Other results	Spin		876
	Number of basis functions		165
	Conformations		2	x