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All results from a given calculation for CBr2 (dibromomethylene)

using model chemistry: CCD/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 CCD/6-31G**
 hartrees
Energy at 0K-5177.887269
Energy at 298.15K-5177.892278
HF Energy-5177.522827
Nuclear repulsion energy325.012796
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 CCD/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 607 569 23.43      
2 A1 205 192 0.45      
3 B2 633 593 341.54      

Unscaled Zero Point Vibrational Energy (zpe) 722.1 cm-1
Scaled (by 0.9376) Zero Point Vibrational Energy (zpe) 677.0 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 CCD/6-31G**
ABC
1.24693 0.04415 0.04264

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.014
Br2 0.000 1.555 -0.087
Br3 0.000 -1.555 -0.087

Atom - Atom Distances (Å)
  C1 Br2 Br3
C11.90571.9057
Br21.90573.1108
Br31.90573.1108

picture of dibromomethylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
Br2 C1 Br3 109.413
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

State 2 (3B1)

Jump to S1C1
Energy calculated at CCD/6-31G**
 hartrees
Energy at 0K-5177.868764
Energy at 298.15K-5177.873793
HF Energy-5177.539338
Nuclear repulsion energy315.413786
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 CCD/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 539 506 1.20      
2 A1 187 175 0.00      
3 B2 855 802 131.70      

Unscaled Zero Point Vibrational Energy (zpe) 790.4 cm-1
Scaled (by 0.9376) Zero Point Vibrational Energy (zpe) 741.1 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 CCD/6-31G**
ABC
2.24578 0.03879 0.03814

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.756
Br2 0.000 1.659 -0.065
Br3 0.000 -1.659 -0.065

Atom - Atom Distances (Å)
  C1 Br2 Br3
C11.85101.8510
Br21.85103.3185
Br31.85103.3185

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