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

using model chemistry: MP4/6-31G*

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 MP4/6-31G*
 hartrees
Energy at 0K-326.764333
Energy at 298.15K-326.762579
HF Energy-326.604876
Nuclear repulsion energy26.007236
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 MP4/6-31G*
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 907 866        

Unscaled Zero Point Vibrational Energy (zpe) 453.4 cm-1
Scaled (by 0.9548) Zero Point Vibrational Energy (zpe) 432.9 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 MP4/6-31G*
B
0.68730

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP4/6-31G*

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Si1 0.000 0.000 0.513
C2 0.000 0.000 -1.196

Atom - Atom Distances (Å)
  Si1 C2
Si11.7090
C21.7090

picture of silicon monocarbide state 1 conformation 1
More geometry information
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability

State 2 (1Σ)

Jump to S1C1
Energy calculated at MP4/6-31G*
 hartrees
Energy at 0K-326.758297
Energy at 298.15K-326.756557
HF Energy-326.491616
Nuclear repulsion energy26.277295
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 MP4/6-31G*
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 966 922        

Unscaled Zero Point Vibrational Energy (zpe) 483.0 cm-1
Scaled (by 0.9548) Zero Point Vibrational Energy (zpe) 461.1 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 MP4/6-31G*
B
0.70165

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP4/6-31G*

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Si1 0.000 0.000 0.507
C2 0.000 0.000 -1.184

Atom - Atom Distances (Å)
  Si1 C2
Si11.6914
C21.6914

picture of silicon monocarbide state 2 conformation 1
More geometry information
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability