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: B3LYP/daug-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 B3LYP/daug-cc-pVTZ
 hartrees
Energy at 0K-5187.781978
Energy at 298.15K 
HF Energy-5187.781978
Nuclear repulsion energy348.581575
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 B3LYP/daug-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 3136 3136 1.02 94.35 0.05 0.09
2 A1 1435 1435 0.01 10.95 0.49 0.65
3 A1 572 572 3.61 19.57 0.07 0.12
4 A1 168 168 0.07 3.95 0.32 0.48
5 A2 1113 1113 0.00 0.81 0.75 0.86
6 B1 3220 3220 2.74 43.81 0.75 0.86
7 B1 816 816 3.60 0.31 0.75 0.86
8 B2 1215 1215 65.14 0.41 0.75 0.86
9 B2 623 623 104.91 4.42 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 6148.3 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 6148.3 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 B3LYP/daug-cc-pVTZ
ABC
0.88149 0.03991 0.03846

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/daug-cc-pVTZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.935
H2 -0.898 0.000 1.535
H3 0.898 0.000 1.535
Br4 0.000 1.633 -0.124
Br5 0.000 -1.633 -0.124

Atom - Atom Distances (Å)
  C1 H2 H3 Br4 Br5
C11.08021.08021.94601.9460
H21.08021.79632.49492.4949
H31.08021.79632.49492.4949
Br41.94602.49492.49493.2656
Br51.94602.49492.49493.2656

picture of dibromomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H2 C1 H3 112.498 H2 C1 Br4 107.593
H2 C1 Br5 107.593 H3 C1 Br4 107.593
H3 C1 Br5 107.593 Br4 C1 Br5 114.083
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/daug-cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.214      
2 H 0.359      
3 H 0.359      
4 Br -0.252      
5 Br -0.252      


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 1.481 1.481
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -43.460 0.000 0.000
y 0.000 -45.067 0.000
z 0.000 0.000 -41.082
Traceless
 xyz
x -0.385 0.000 0.000
y 0.000 -2.796 0.000
z 0.000 0.000 3.181
Polar
3z2-r26.362
x2-y21.608
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 7.092 0.000 0.000
y 0.000 11.766 0.000
z 0.000 0.000 7.753


<r2> (average value of r2) Å2
<r2> 226.255
(<r2>)1/2 15.042