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All results from a given calculation for CH2Br2 (dibromomethane)

using model chemistry: B3PW91/6-31G(2df,p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at B3PW91/6-31G(2df,p)
 hartrees
Energy at 0K-5183.011769
Energy at 298.15K 
HF Energy-5183.011769
Nuclear repulsion energy355.453753
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 B3PW91/6-31G(2df,p)
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 3134 3013 1.83      
2 A1 1436 1380 0.01      
3 A1 610 586 3.56      
4 A1 177 171 0.11      
5 A2 1123 1080 0.00      
6 B1 3217 3092 1.09      
7 B1 826 794 3.65      
8 B2 1219 1172 51.53      
9 B2 683 657 83.85      

Unscaled Zero Point Vibrational Energy (zpe) 6211.6 cm-1
Scaled (by 0.9614) Zero Point Vibrational Energy (zpe) 5971.8 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 B3PW91/6-31G(2df,p)
ABC
0.89006 0.04174 0.04018

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/6-31G(2df,p)

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.926
H2 -0.896 0.000 1.541
H3 0.896 0.000 1.541
Br4 0.000 1.596 -0.123
Br5 0.000 -1.596 -0.123

Atom - Atom Distances (Å)
  C1 H2 H3 Br4 Br5
C11.08671.08671.91051.9105
H21.08671.79242.47412.4741
H31.08671.79242.47412.4741
Br41.91052.47412.47413.1927
Br51.91052.47412.47413.1927

picture of dibromomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H2 C1 H3 111.115 H2 C1 Br4 108.102
H2 C1 Br5 108.102 H3 C1 Br4 108.102
H3 C1 Br5 108.102 Br4 C1 Br5 113.353
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/6-31G(2df,p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.511      
2 H 0.220      
3 H 0.220      
4 Br 0.035      
5 Br 0.035      


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 1.448 1.448
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -42.334 0.000 0.000
y 0.000 -43.843 0.000
z 0.000 0.000 -39.936
Traceless
 xyz
x -0.444 0.000 0.000
y 0.000 -2.708 0.000
z 0.000 0.000 3.153
Polar
3z2-r26.305
x2-y21.510
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.816 0.000 0.000
y 0.000 9.990 0.000
z 0.000 0.000 6.492


<r2> (average value of r2) Å2
<r2> 217.210
(<r2>)1/2 14.738