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Experimental data for Si2 (Silicon diatomic)

22 02 02 11 45
Other names
Silicon dimer; silicon dimer ; disilicon;
INChI INChIKey SMILES IUPAC name
InChI=1S/Si2/c1-2 NTQGILPNLZZOJH-UHFFFAOYSA-N [Si]=[Si] disilicon
State Conformation
3Σg D*H
Enthalpy of formation (Hfg), Entropy, Integrated heat capacity (0 K to 298.15 K) (HH), Heat Capacity (Cp)
Property Value Uncertainty units Reference Comment
Hfg(298.15K) enthalpy of formation 583.86 22.00 kJ mol-1 Gurvich
Hfg(0K) enthalpy of formation 580.00 22.00 kJ mol-1 Gurvich
Entropy (298.15K) entropy 238.00   J K-1 mol-1 Gurvich
Integrated Heat Capacity (0 to 298.15K) integrated heat capacity 10.30   kJ mol-1 Gurvich
Heat Capacity (298.15K) heat capacity 36.26   J K-1 mol-1 Gurvich
Information can also be found for this species in the NIST Chemistry Webbook
Vibrational levels (cm-1) vibrations
Mode Number Symmetry Frequency Intensity Comment Description
Fundamental(cm-1) Harmonic(cm-1) Reference (km mol-1) unc. Reference
1 Σg 507 511 VEEL5      

Detailed diatomic data
ωe ωexe ωeye Be αe ZPE reference
510.98 2.02 0.239 0.00135 255.0223 2007Iri:389

vibrational zero-point energy: 253.5 cm-1 (from fundamental vibrations)
Calculated vibrational frequencies for Si2 (Silicon diatomic).
Rotational Constants (cm-1) rotational constants
See section I.F.4 to change rotational constant units An error occurred on the server when processing the URL. Please contact the system administrator.

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A B C reference comment