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All results from a given calculation for CH2Br2 (dibromomethane)

using model chemistry: QCISD/cc-pVTZ-PP

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at QCISD/cc-pVTZ-PP
 hartrees
Energy at 0K-870.705512
Energy at 298.15K 
HF Energy-870.053884
Nuclear repulsion energy213.011857
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 QCISD/cc-pVTZ-PP
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 3159 3159 2.78      
2 A1 1461 1461 0.12      
3 A1 603 603 3.43      
4 A1 175 175 0.08      
5 A2 1134 1134 0.00      
6 B1 3240 3240 0.78      
7 B1 831 831 3.70      
8 B2 1239 1239 66.36      
9 B2 692 692 70.30      

Unscaled Zero Point Vibrational Energy (zpe) 6267.2 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 6267.2 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 QCISD/cc-pVTZ-PP
ABC
0.88435 0.04121 0.03967

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/cc-pVTZ-PP

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.932
H2 -0.895 0.000 1.538
H3 0.895 0.000 1.538
Br4 0.000 1.607 -0.124
Br5 0.000 -1.607 -0.124

Atom - Atom Distances (Å)
  C1 H2 H3 Br4 Br5
C11.08091.08091.92261.9226
H21.08091.79062.47872.4787
H31.08091.79062.47872.4787
Br41.92262.47872.47873.2135
Br51.92262.47872.47873.2135

picture of dibromomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H2 C1 H3 111.839 H2 C1 Br4 107.921
H2 C1 Br5 107.921 H3 C1 Br4 107.921
H3 C1 Br5 107.921 Br4 C1 Br5 113.385
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability