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All results from a given calculation for CH2Br2 (dibromomethane)

using model chemistry: PBE1PBE/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at PBE1PBE/6-31G*
 hartrees
Energy at 0K-5182.001384
Energy at 298.15K-5182.009422
HF Energy-5182.001384
Nuclear repulsion energy352.734939
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 PBE1PBE/6-31G*
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 3181 3023 2.02      
2 A1 1468 1395 0.06      
3 A1 601 571 4.72      
4 A1 179 170 0.09      
5 A2 1140 1084 0.00      
6 B1 3274 3111 1.08      
7 B1 819 778 5.33      
8 B2 1241 1179 68.96      
9 B2 663 630 96.38      

Unscaled Zero Point Vibrational Energy (zpe) 6282.6 cm-1
Scaled (by 0.9503) Zero Point Vibrational Energy (zpe) 5970.4 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 PBE1PBE/6-31G*
ABC
0.87746 0.04109 0.03955

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBE1PBE/6-31G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.936
H2 -0.901 0.000 1.542
H3 0.901 0.000 1.542
Br4 0.000 1.609 -0.124
Br5 0.000 -1.609 -0.124

Atom - Atom Distances (Å)
  C1 H2 H3 Br4 Br5
C11.08601.08601.92681.9268
H21.08601.80192.48542.4854
H31.08601.80192.48542.4854
Br41.92682.48542.48543.2181
Br51.92682.48542.48543.2181

picture of dibromomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H2 C1 H3 112.124 H2 C1 Br4 107.887
H2 C1 Br5 107.887 H3 C1 Br4 107.887
H3 C1 Br5 107.887 Br4 C1 Br5 113.247
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBE1PBE/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.390      
2 H 0.260      
3 H 0.260      
4 Br -0.065      
5 Br -0.065      


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 1.554 1.554
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -42.623 0.000 0.000
y 0.000 -43.831 0.000
z 0.000 0.000 -40.047
Traceless
 xyz
x -0.684 0.000 0.000
y 0.000 -2.496 0.000
z 0.000 0.000 3.180
Polar
3z2-r26.360
x2-y21.209
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.575 0.000 0.000
y 0.000 8.959 0.000
z 0.000 0.000 5.388


<r2> (average value of r2) Å2
<r2> 220.281
(<r2>)1/2 14.842