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: wB97X-D/cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at wB97X-D/cc-pVTZ
 hartrees
Energy at 0K-5187.828686
Energy at 298.15K 
HF Energy-5187.828686
Nuclear repulsion energy352.129494
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 wB97X-D/cc-pVTZ
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 3151 3012 1.88 92.24 0.06 0.11
2 A1 1451 1388 0.02 10.80 0.62 0.77
3 A1 602 575 3.74 15.12 0.07 0.14
4 A1 175 167 0.10 4.05 0.43 0.60
5 A2 1135 1085 0.00 3.09 0.75 0.86
6 B1 3235 3093 1.53 46.38 0.75 0.86
7 B1 826 790 4.53 1.13 0.75 0.86
8 B2 1238 1183 64.48 0.01 0.75 0.86
9 B2 684 654 85.23 5.48 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 6248.2 cm-1
Scaled (by 0.956) Zero Point Vibrational Energy (zpe) 5973.2 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 wB97X-D/cc-pVTZ
ABC
0.88871 0.04082 0.03932

See section I.F.4 to change rotational constant units
Geometric Data calculated at wB97X-D/cc-pVTZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.929
H2 -0.895 0.000 1.535
H3 0.895 0.000 1.535
Br4 0.000 1.614 -0.123
Br5 0.000 -1.614 -0.123

Atom - Atom Distances (Å)
  C1 H2 H3 Br4 Br5
C11.08141.08141.92711.9271
H21.08141.79092.48182.4818
H31.08141.79092.48182.4818
Br41.92712.48182.48183.2286
Br51.92712.48182.48183.2286

picture of dibromomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H2 C1 H3 111.799 H2 C1 Br4 107.829
H2 C1 Br5 107.829 H3 C1 Br4 107.829
H3 C1 Br5 107.829 Br4 C1 Br5 113.797
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at wB97X-D/cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.133      
2 H 0.133      
3 H 0.133      
4 Br -0.067      
5 Br -0.067      


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 1.530 1.530
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -43.070 0.000 0.000
y 0.000 -44.501 0.000
z 0.000 0.000 -40.655
Traceless
 xyz
x -0.492 0.000 0.000
y 0.000 -2.638 0.000
z 0.000 0.000 3.130
Polar
3z2-r26.261
x2-y21.431
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.141 0.000 0.000
y 0.000 10.036 0.000
z 0.000 0.000 6.135


<r2> (average value of r2) Å2
<r2> 221.681
(<r2>)1/2 14.889