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)

Property		Experiment	Calculated	Comparison
Energies Entropies	Enthalpy 298.15K	x
	Enthalpy 0K	x
	Energy 0K		1053
	Energy 298.15K		1014
	Atomization Enthalpy 298.15K	x	48	x
	Atomization Enthalpy 0K	x	53	x
	Entropy (298.15K)	x	21	x
	Entropy at any temperature		21
	Integrated Heat Capacity	x	21	x
	Heat Capacity (Cp)	x	21	x
	Nuclear Repulsion Energy		1033
	HOMO-LUMO Energies		968
	Barriers to Internal Rotation		275
Geometries	Cartesians	x	990
	Internal Coordinates	x	990	x
	Products of moments of inertia	x	996	x
	Rotational Constants	x	1004	x
	Point Group		1034
Vibrations	Vibrational Frequencies	fun.	1003	x
	Vibrational Intensities		1367
	Zero-point energies	x	1003	x
	Vibrational scaling factors	x
	Anharmonic frequencies and constants
	Raman frequencies and intensities		422
Electronic States	Electronic states	x	6
Electrostatics	Atom charges		531
	Dipole	x	633	x
	Quadrupole	x	553	x
	Polarizability	x	619	x
Other results	Spin		6
	Number of basis functions		165
	Conformations		1