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All results from a given calculation for SiC (silicon monocarbide)

using model chemistry: CISD/6-31G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C*V 3Σ
2 1 yes C*V 1Σ

State 1 (3Σ)

Jump to S2C1
Energy calculated at CISD/6-31G
 hartrees
Energy at 0K-326.673020
Energy at 298.15K-326.671243
HF Energy-326.578664
Nuclear repulsion energy24.719810
The energy at 298.15K was derived from the energy at 0K and an integrated heat capacity that used the calculated vibrational frequencies.
Vibrational Frequencies calculated at CISD/6-31G
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 Σ 820 769 15.13      

Unscaled Zero Point Vibrational Energy (zpe) 409.9 cm-1
Scaled (by 0.9378) Zero Point Vibrational Energy (zpe) 384.4 cm-1
See section III.C.1 List or set vibrational scaling factors to change the scale factors used here.
See section III.C.2 Calculate a vibrational scaling factor for a given set of molecules to determine the least squares best scaling factor.
Rotational Constants (cm-1) from geometry optimized at CISD/6-31G
B
0.62080

See section I.F.4 to change rotational constant units
Geometric Data calculated at CISD/6-31G

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Si1 0.000 0.000 0.539
C2 0.000 0.000 -1.259

Atom - Atom Distances (Å)
  Si1 C2
Si11.7982
C21.7982

picture of silicon monocarbide state 1 conformation 1
More geometry information
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

State 2 (1Σ)

Jump to S1C1
Energy calculated at CISD/6-31G
 hartrees
Energy at 0K-326.629865
Energy at 298.15K-326.628132
HF Energy-326.458164
Nuclear repulsion energy26.212496
The energy at 298.15K was derived from the energy at 0K and an integrated heat capacity that used the calculated vibrational frequencies.
Vibrational Frequencies calculated at CISD/6-31G
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 Σ 999 937 0.08      

Unscaled Zero Point Vibrational Energy (zpe) 499.5 cm-1
Scaled (by 0.9378) Zero Point Vibrational Energy (zpe) 468.4 cm-1
See section III.C.1 List or set vibrational scaling factors to change the scale factors used here.
See section III.C.2 Calculate a vibrational scaling factor for a given set of molecules to determine the least squares best scaling factor.
Rotational Constants (cm-1) from geometry optimized at CISD/6-31G
B
0.69804

See section I.F.4 to change rotational constant units
Geometric Data calculated at CISD/6-31G

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Si1 0.000 0.000 0.509
C2 0.000 0.000 -1.187

Atom - Atom Distances (Å)
  Si1 C2
Si11.6958
C21.6958

picture of silicon monocarbide state 2 conformation 1
More geometry information
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability