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All results from a given calculation for CH2Br2 (dibromomethane)

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
Energy calculated at MP4=FULL/3-21G
 hartrees
Energy at 0K-5159.114957
Energy at 298.15K 
HF Energy-5158.912034
Nuclear repulsion energy338.002282
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 3148 3081        
2 A1 1495 1463        
3 A1 531 520        
4 A1 161 158        
5 A2 1136 1112        
6 B1 3233 3165        
7 B1 801 784        
8 B2 1246 1219        
9 B2 638 624        

Unscaled Zero Point Vibrational Energy (zpe) 6194.8 cm-1
Scaled (by 0.9788) Zero Point Vibrational Energy (zpe) 6063.5 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
0.83613 0.03743 0.03608

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 0.964
H2 -0.904 0.000 1.570
H3 0.904 0.000 1.570
Br4 0.000 1.686 -0.127
Br5 0.000 -1.686 -0.127

Atom - Atom Distances (Å)
  C1 H2 H3 Br4 Br5
C11.08791.08792.00852.0085
H21.08791.80762.55732.5573
H31.08791.80762.55732.5573
Br42.00852.55732.55733.3721
Br52.00852.55732.55733.3721

picture of dibromomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H2 C1 H3 112.352 H2 C1 Br4 107.608
H2 C1 Br5 107.608 H3 C1 Br4 107.608
H3 C1 Br5 107.608 Br4 C1 Br5 114.163
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability