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All results from a given calculation for CBr2 (dibromomethylene)

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 C2V 1A1
2 1 yes C2V 3B1

State 1 (1A1)

Jump to S2C1
Energy calculated at CISD/6-31G*
 hartrees
Energy at 0K-5177.848591
Energy at 298.15K-5177.853620
HF Energy-5177.523097
Nuclear repulsion energy326.393115
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
4/u)
Dep P Dep U
1 A1 617 571 22.35      
2 A1 209 194 0.40      
3 B2 655 606 347.06      

Unscaled Zero Point Vibrational Energy (zpe) 740.5 cm-1
Scaled (by 0.9258) Zero Point Vibrational Energy (zpe) 685.5 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 CISD/6-31G*
ABC
1.26756 0.04448 0.04297

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.006
Br2 0.000 1.550 -0.086
Br3 0.000 -1.550 -0.086

Atom - Atom Distances (Å)
  C1 Br2 Br3
C11.89581.8958
Br21.89583.0993
Br31.89583.0993

picture of dibromomethylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
Br2 C1 Br3 109.656
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

State 2 (3B1)

Jump to S1C1
Energy calculated at CISD/6-31G*
 hartrees
Energy at 0K-5177.838317
Energy at 298.15K-5177.843359
HF Energy-5177.539391
Nuclear repulsion energy316.312068
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
4/u)
Dep P Dep U
1 A1 550 509 1.25      
2 A1 190 176 0.00      
3 B2 875 810 134.65      

Unscaled Zero Point Vibrational Energy (zpe) 807.4 cm-1
Scaled (by 0.9258) Zero Point Vibrational Energy (zpe) 747.4 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*
ABC
2.27161 0.03900 0.03834

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.751
Br2 0.000 1.655 -0.064
Br3 0.000 -1.655 -0.064

Atom - Atom Distances (Å)
  C1 Br2 Br3
C11.84511.8451
Br21.84513.3099
Br31.84513.3099

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