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 C₅H₈ (Cyclopentene)

Property		Experiment	Calculated	Comparison
Energies Entropies	Enthalpy 298.15K	x
	Enthalpy 0K	x
	Energy 0K		251
	Energy 298.15K		250
	Atomization Enthalpy 298.15K	x	182	x
	Atomization Enthalpy 0K	x	180	x
	Entropy (298.15K)	x	176	x
	Entropy at any temperature		176
	Integrated Heat Capacity	x	176	x
	Heat Capacity (Cp)	x	176	x
	Nuclear Repulsion Energy		235
	HOMO-LUMO Energies		231
	Barriers to Internal Rotation		0
Geometries	Cartesians		212
	Internal Coordinates	x	211	x
	Products of moments of inertia	x	229	x
	Rotational Constants	x	234	x
	Point Group		234
Vibrations	Vibrational Frequencies	fun.	230	x
	Vibrational Intensities		243
	Zero-point energies	x	230	x
	Vibrational scaling factors	x
	Anharmonic frequencies and constants		1
	Raman frequencies and intensities		0
Electronic States	Electronic states	x	0
Electrostatics	Atom charges		178
	Dipole	x	185	x
	Quadrupole		178
	Polarizability		169
Other results	Spin		0
	Number of basis functions		7
	Conformations		1