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: PM6

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
Energy calculated at PM6
 hartrees
Energy at 0K 
Energy at 298.15K0.004445
HF Energy0.004445
Nuclear repulsion energy50.247909
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 PM6
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 2695 2864 100.24      
2 A1 1221 1297 22.18      
3 A1 593 630 9.04      
4 A1 158 168 0.02      
5 A2 983 1044 0.00      
6 B1 2635 2799 152.49      
7 B1 760 807 23.74      
8 B2 1142 1214 6.52      
9 B2 708 752 109.08      

Unscaled Zero Point Vibrational Energy (zpe) 5447.3 cm-1
Scaled (by 1.0624) Zero Point Vibrational Energy (zpe) 5787.2 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 PM6
ABC
0.83096 0.04159 0.03992

See section I.F.4 to change rotational constant units
Geometric Data calculated at PM6

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.962
H2 -0.904 0.000 1.595
H3 0.904 0.000 1.595
Br4 0.000 1.599 -0.128
Br5 0.000 -1.599 -0.128

Atom - Atom Distances (Å)
  C1 H2 H3 Br4 Br5
C11.10351.10351.93531.9353
H21.10351.80832.51842.5184
H31.10351.80832.51842.5184
Br41.93532.51842.51843.1985
Br51.93532.51842.51843.1985

picture of dibromomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H2 C1 H3 110.031 H2 C1 Br4 108.837
H2 C1 Br5 108.837 H3 C1 Br4 108.837
H3 C1 Br5 108.837 Br4 C1 Br5 111.455
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PM6 Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.239      
2 H 0.195      
3 H 0.195      
4 Br -0.076      
5 Br -0.076      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.000 0.000 1.380 1.380
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.180 0.000 0.000
y 0.000 7.868 0.000
z 0.000 0.000 3.268


<r2> (average value of r2) Å2
<r2> 0.000
(<r2>)1/2 0.000