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/6-311+G(3df,2p)

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/6-311+G(3df,2p)
 hartrees
Energy at 0K-5187.620082
Energy at 298.15K 
HF Energy-5187.620082
Nuclear repulsion energy348.673551
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/6-311+G(3df,2p)
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 3131 3028 0.87 86.04 0.05 0.09
2 A1 1438 1391 0.00 11.16 0.49 0.65
3 A1 573 554 3.56 18.86 0.06 0.12
4 A1 168 163 0.07 4.00 0.34 0.51
5 A2 1115 1078 0.00 0.94 0.75 0.86
6 B1 3218 3112 2.96 43.52 0.75 0.86
7 B1 816 789 3.76 0.36 0.75 0.86
8 B2 1217 1177 63.91 0.30 0.75 0.86
9 B2 624 604 105.29 4.83 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 6149.9 cm-1
Scaled (by 0.967) Zero Point Vibrational Energy (zpe) 5946.9 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/6-311+G(3df,2p)
ABC
0.88202 0.03993 0.03848

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/6-311+G(3df,2p)

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.934
H2 -0.898 0.000 1.534
H3 0.898 0.000 1.534
Br4 0.000 1.632 -0.124
Br5 0.000 -1.632 -0.124

Atom - Atom Distances (Å)
  C1 H2 H3 Br4 Br5
C11.08041.08041.94541.9454
H21.08041.79672.49442.4944
H31.08041.79672.49442.4944
Br41.94542.49442.49443.2648
Br51.94542.49442.49443.2648

picture of dibromomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H2 C1 H3 112.512 H2 C1 Br4 107.588
H2 C1 Br5 107.588 H3 C1 Br4 107.588
H3 C1 Br5 107.588 Br4 C1 Br5 114.089
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/6-311+G(3df,2p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.378      
2 H 0.210      
3 H 0.210      
4 Br -0.021      
5 Br -0.021      


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 1.486 1.486
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -43.494 0.000 0.000
y 0.000 -45.027 0.000
z 0.000 0.000 -41.068
Traceless
 xyz
x -0.447 0.000 0.000
y 0.000 -2.746 0.000
z 0.000 0.000 3.193
Polar
3z2-r26.386
x2-y21.532
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.771 0.000 0.000
y 0.000 11.493 0.000
z 0.000 0.000 7.405


<r2> (average value of r2) Å2
<r2> 226.145
(<r2>)1/2 15.038