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All results from a given calculation for CBr2 (dibromomethylene)

using model chemistry: CCSD=FULL/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 CCSD=FULL/6-31G*
 hartrees
Energy at 0K-5177.948892
Energy at 298.15K-5177.953896
HF Energy-5177.522815
Nuclear repulsion energy324.957038
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 CCSD=FULL/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 605 574 20.01      
2 A1 203 193 0.41      
3 B2 637 605 325.00      

Unscaled Zero Point Vibrational Energy (zpe) 722.3 cm-1
Scaled (by 0.9498) Zero Point Vibrational Energy (zpe) 686.0 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 CCSD=FULL/6-31G*
ABC
1.24636 0.04413 0.04262

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD=FULL/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 1.556 -0.087
Br3 0.000 -1.556 -0.087

Atom - Atom Distances (Å)
  C1 Br2 Br3
C11.90601.9060
Br21.90603.1113
Br31.90603.1113

picture of dibromomethylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
Br2 C1 Br3 109.409
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

State 2 (3B1)

Jump to S1C1
Energy calculated at CCSD=FULL/6-31G*
 hartrees
Energy at 0K-5177.930416
Energy at 298.15K-5177.935444
HF Energy-5177.539377
Nuclear repulsion energy315.926701
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 CCSD=FULL/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 541 514 0.79      
2 A1 186 177 0.01      
3 B2 860 817 134.62      

Unscaled Zero Point Vibrational Energy (zpe) 793.6 cm-1
Scaled (by 0.9498) Zero Point Vibrational Energy (zpe) 753.8 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 CCSD=FULL/6-31G*
ABC
2.26440 0.03890 0.03825

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.753
Br2 0.000 1.657 -0.065
Br3 0.000 -1.657 -0.065

Atom - Atom Distances (Å)
  C1 Br2 Br3
C11.84741.8474
Br21.84743.3138
Br31.84743.3138

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