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All results from a given calculation for CBr2 (dibromomethylene)

using model chemistry: MP3=FULL/TZVP

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 MP3=FULL/TZVP
 hartrees
Energy at 0K-5183.275562
Energy at 298.15K-5183.280586
HF Energy-5182.578595
Nuclear repulsion energy326.836406
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 MP3=FULL/TZVP
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 614 574 26.99      
2 A1 200 187 0.42      
3 B2 651 607 375.81      

Unscaled Zero Point Vibrational Energy (zpe) 732.5 cm-1
Scaled (by 0.9337) Zero Point Vibrational Energy (zpe) 683.9 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 MP3=FULL/TZVP
ABC
1.28822 0.04452 0.04303

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP3=FULL/TZVP

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.998
Br2 0.000 1.549 -0.086
Br3 0.000 -1.549 -0.086

Atom - Atom Distances (Å)
  C1 Br2 Br3
C11.89021.8902
Br21.89023.0979
Br31.89023.0979

picture of dibromomethylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
Br2 C1 Br3 110.067
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

State 2 (3B1)

Jump to S1C1
Energy calculated at MP3=FULL/TZVP
 hartrees
Energy at 0K-5183.261137
Energy at 298.15K-5183.266174
HF Energy-5182.596701
Nuclear repulsion energy314.952131
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 MP3=FULL/TZVP
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 535 500 1.15      
2 A1 188 175 0.02      
3 B2 867 810 142.06      

Unscaled Zero Point Vibrational Energy (zpe) 794.8 cm-1
Scaled (by 0.9337) Zero Point Vibrational Energy (zpe) 742.1 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 MP3=FULL/TZVP
ABC
2.41439 0.03845 0.03785

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP3=FULL/TZVP

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.729
Br2 0.000 1.667 -0.062
Br3 0.000 -1.667 -0.062

Atom - Atom Distances (Å)
  C1 Br2 Br3
C11.84491.8449
Br21.84493.3332
Br31.84493.3332

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