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 Si₂H₄ (Disilene)

Property		Experiment	Calculated	Comparison
Energies Entropies	Enthalpy 298.15K
	Enthalpy 0K
	Energy 0K		1758
	Energy 298.15K		30
	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		1761
	HOMO-LUMO Energies		1584
	Barriers to Internal Rotation		0
Geometries	Cartesians		1761
	Internal Coordinates		1761
	Products of moments of inertia		1737
	Rotational Constants		1761
	Point Group		1763
Vibrations	Vibrational Frequencies		1746
	Vibrational Intensities		1580
	Zero-point energies		1746
	Vibrational scaling factors
	Anharmonic frequencies and constants
	Raman frequencies and intensities		1263
Electronic States	Electronic states	x	0
Electrostatics	Atom charges		1059
	Dipole		1434
	Quadrupole		1225
	Polarizability		1260
Other results	Spin		0
	Number of basis functions		105
	Conformations		3	x