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All results from a given calculation for CBr2 (dibromomethylene)

using model chemistry: MP4=FULL/3-21G

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 MP4=FULL/3-21G
 hartrees
Energy at 0K-5157.827488
Energy at 298.15K-5157.832329
HF Energy-5157.623414
Nuclear repulsion energy302.825431
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 MP4=FULL/3-21G
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 517 506        
2 A1 167 164        
3 B2 542 530        

Unscaled Zero Point Vibrational Energy (zpe) 612.6 cm-1
Scaled (by 0.9788) Zero Point Vibrational Energy (zpe) 599.6 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 MP4=FULL/3-21G
ABC
1.06457 0.03841 0.03708

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP4=FULL/3-21G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.098
Br2 0.000 1.667 -0.094
Br3 0.000 -1.667 -0.094

Atom - Atom Distances (Å)
  C1 Br2 Br3
C12.04942.0494
Br22.04943.3348
Br32.04943.3348

picture of dibromomethylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
Br2 C1 Br3 108.898
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

State 2 (3B1)

Jump to S1C1
Energy calculated at MP4=FULL/3-21G
 hartrees
Energy at 0K-5157.809903
Energy at 298.15K-5157.814814
HF Energy-5157.651113
Nuclear repulsion energy300.075006
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 MP4=FULL/3-21G
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 451 441        
2 A1 164 161        
3 B2 797 780        

Unscaled Zero Point Vibrational Energy (zpe) 705.9 cm-1
Scaled (by 0.9788) Zero Point Vibrational Energy (zpe) 690.9 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 MP4=FULL/3-21G
ABC
2.25176 0.03484 0.03431

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP4=FULL/3-21G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.755
Br2 0.000 1.751 -0.065
Br3 0.000 -1.751 -0.065

Atom - Atom Distances (Å)
  C1 Br2 Br3
C11.93321.9332
Br21.93323.5019
Br31.93323.5019

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