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

using model chemistry: QCISD/cc-pV(T+d)Z

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 QCISD/cc-pV(T+d)Z
 hartrees
Energy at 0K-326.853271
Energy at 298.15K-326.851534
HF Energy-326.645824
Nuclear repulsion energy25.849186
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 QCISD/cc-pV(T+d)Z
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 Σ 970 926 12.72      

Unscaled Zero Point Vibrational Energy (zpe) 485.1 cm-1
Scaled (by 0.9547) Zero Point Vibrational Energy (zpe) 463.1 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 QCISD/cc-pV(T+d)Z
B
0.67882

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/cc-pV(T+d)Z

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Si1 0.000 0.000 0.516
C2 0.000 0.000 -1.204

Atom - Atom Distances (Å)
  Si1 C2
Si11.7196
C21.7196

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 QCISD/cc-pV(T+d)Z
 hartrees
Energy at 0K-326.823749
Energy at 298.15K-326.822030
HF Energy-326.536097
Nuclear repulsion energy26.922919
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 QCISD/cc-pV(T+d)Z
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 Σ 1076 1027 5.73      

Unscaled Zero Point Vibrational Energy (zpe) 537.9 cm-1
Scaled (by 0.9547) Zero Point Vibrational Energy (zpe) 513.5 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 QCISD/cc-pV(T+d)Z
B
0.73639

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/cc-pV(T+d)Z

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Si1 0.000 0.000 0.495
C2 0.000 0.000 -1.156

Atom - Atom Distances (Å)
  Si1 C2
Si11.6510
C21.6510

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