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 C₅H₄ (pentatetraene)

Property		Experiment	Calculated	Comparison
Energies Entropies	Enthalpy 298.15K
	Enthalpy 0K
	Energy 0K		576
	Energy 298.15K		447
	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		582
	HOMO-LUMO Energies		512
	Barriers to Internal Rotation		0
Geometries	Cartesians		576
	Internal Coordinates		576
	Products of moments of inertia		571
	Rotational Constants		576
	Point Group		583
Vibrations	Vibrational Frequencies		557
	Vibrational Intensities		509
	Zero-point energies		557
	Vibrational scaling factors
	Anharmonic frequencies and constants
	Raman frequencies and intensities		5
Electronic States	Electronic states	x	0
Electrostatics	Atom charges		326
	Dipole		465
	Quadrupole		377
	Polarizability		391
Other results	Spin		0
	Number of basis functions		34
	Conformations		1