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All results from a given calculation for BC (boron monocarbide)

using model chemistry: QCISD/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C*V 4Σ-
2 1 yes C*V 2Π

State 1 (4Σ-)

Jump to S2C1
Energy calculated at QCISD/3-21G*
 hartrees
Energy at 0K-62.080880
Energy at 298.15K-62.078385
HF Energy-61.961159
Nuclear repulsion energy10.337351
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/3-21G*
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 987 948 15.31      

Unscaled Zero Point Vibrational Energy (zpe) 493.4 cm-1
Scaled (by 0.9611) Zero Point Vibrational Energy (zpe) 474.2 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/3-21G*
B
1.24489

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/3-21G*

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
B1 0.000 0.000 -0.838
C2 0.000 0.000 0.698

Atom - Atom Distances (Å)
  B1 C2
B11.5357
C21.5357

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

State 2 (2Π)

Jump to S1C1
Energy calculated at QCISD/3-21G*
 hartrees
Energy at 0K-62.066058
Energy at 298.15K-62.063584
Nuclear repulsion energy10.616260
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/3-21G*
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 1129 1085 11.33      

Unscaled Zero Point Vibrational Energy (zpe) 564.5 cm-1
Scaled (by 0.9611) Zero Point Vibrational Energy (zpe) 542.5 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/3-21G*
B
1.31298

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/3-21G*

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
B1 0.000 0.000 -0.816
C2 0.000 0.000 0.680

Atom - Atom Distances (Å)
  B1 C2
B11.4954
C21.4954

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