return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

All results from a given calculation for CH2Br2 (dibromomethane)

using model chemistry: B2PLYP=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 B2PLYP=FULL/3-21G
 hartrees
Energy at 0K-5161.671937
Energy at 298.15K 
HF Energy-5161.612507
Nuclear repulsion energy340.972340
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 B2PLYP=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 3197 3044 3.53      
2 A1 1505 1433 0.02      
3 A1 550 523 4.49      
4 A1 166 158 0.07      
5 A2 1154 1099 0.00      
6 B1 3284 3126 0.02      
7 B1 815 776 8.79      
8 B2 1262 1201 65.87      
9 B2 644 614 89.55      

Unscaled Zero Point Vibrational Energy (zpe) 6288.1 cm-1
Scaled (by 0.952) Zero Point Vibrational Energy (zpe) 5986.2 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 B2PLYP=FULL/3-21G
ABC
0.85472 0.03807 0.03671

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP=FULL/3-21G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.952
H2 -0.898 0.000 1.555
H3 0.898 0.000 1.555
Br4 0.000 1.672 -0.126
Br5 0.000 -1.672 -0.126

Atom - Atom Distances (Å)
  C1 H2 H3 Br4 Br5
C11.08211.08211.98941.9894
H21.08211.79692.53562.5356
H31.08211.79692.53562.5356
Br41.98942.53562.53563.3437
Br51.98942.53562.53563.3437

picture of dibromomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H2 C1 H3 112.249 H2 C1 Br4 107.583
H2 C1 Br5 107.583 H3 C1 Br4 107.583
H3 C1 Br5 107.583 Br4 C1 Br5 114.365
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability