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All results from a given calculation for CBr2 (dibromomethylene)

using model chemistry: QCISD/6-311G*

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 QCISD/6-311G*
 hartrees
Energy at 0K-5182.895201
Energy at 298.15K-5182.900205
HF Energy-5182.491095
Nuclear repulsion energy324.079853
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/6-311G*
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 599 573 18.95      
2 A1 196 188 0.51      
3 B2 651 623 340.50      

Unscaled Zero Point Vibrational Energy (zpe) 722.8 cm-1
Scaled (by 0.9574) Zero Point Vibrational Energy (zpe) 692.0 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/6-311G*
ABC
1.28301 0.04369 0.04225

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/6-311G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.000
Br2 0.000 1.563 -0.086
Br3 0.000 -1.563 -0.086

Atom - Atom Distances (Å)
  C1 Br2 Br3
C11.90331.9033
Br21.90333.1270
Br31.90333.1270

picture of dibromomethylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
Br2 C1 Br3 110.460
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

State 2 (3B1)

Jump to S1C1
Energy calculated at QCISD/6-311G*
 hartrees
Energy at 0K-5182.877705
Energy at 298.15K-5182.882744
HF Energy-5182.509077
Nuclear repulsion energy314.765088
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/6-311G*
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 538 515 0.33      
2 A1 188 180 0.06      
3 B2 880 842 146.02      

Unscaled Zero Point Vibrational Energy (zpe) 803.0 cm-1
Scaled (by 0.9574) Zero Point Vibrational Energy (zpe) 768.8 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/6-311G*
ABC
2.43282 0.03838 0.03779

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/6-311G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.726
Br2 0.000 1.668 -0.062
Br3 0.000 -1.668 -0.062

Atom - Atom Distances (Å)
  C1 Br2 Br3
C11.84501.8450
Br21.84503.3363
Br31.84503.3363

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