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All results from a given calculation for CH2Br2 (dibromomethane)

using model chemistry: B3PW91/STO-3G

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/STO-3G
 hartrees
Energy at 0K-5130.894200
Energy at 298.15K 
HF Energy-5130.894200
Nuclear repulsion energy348.079886
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/STO-3G
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 3339 2955 0.46 41.86 0.13 0.23
2 A1 1622 1436 0.01 15.70 0.73 0.84
3 A1 658 582 6.75 9.95 0.13 0.23
4 A1 190 168 0.52 4.09 0.55 0.71
5 A2 1254 1110 0.00 12.98 0.75 0.86
6 B1 3460 3062 0.24 32.95 0.75 0.86
7 B1 882 780 0.30 2.17 0.75 0.86
8 B2 1356 1200 52.17 3.01 0.75 0.86
9 B2 796 704 65.91 5.71 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 6778.6 cm-1
Scaled (by 0.885) Zero Point Vibrational Energy (zpe) 5999.0 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/STO-3G
ABC
0.91742 0.03952 0.03817

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/STO-3G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.902
H2 -0.895 0.000 1.549
H3 0.895 0.000 1.549
Br4 0.000 1.641 -0.122
Br5 0.000 -1.641 -0.122

Atom - Atom Distances (Å)
  C1 H2 H3 Br4 Br5
C11.10451.10451.93361.9336
H21.10451.78992.50672.5067
H31.10451.78992.50672.5067
Br41.93362.50672.50673.2816
Br51.93362.50672.50673.2816

picture of dibromomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H2 C1 H3 108.247 H2 C1 Br4 108.064
H2 C1 Br5 108.064 H3 C1 Br4 108.064
H3 C1 Br5 108.064 Br4 C1 Br5 116.110
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/STO-3G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.246      
2 H 0.115      
3 H 0.115      
4 Br 0.008      
5 Br 0.008      


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 1.374 1.374
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -38.844 0.000 0.000
y 0.000 -41.390 0.000
z 0.000 0.000 -37.473
Traceless
 xyz
x 0.588 0.000 0.000
y 0.000 -3.232 0.000
z 0.000 0.000 2.644
Polar
3z2-r25.288
x2-y22.547
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 0.936 0.000 0.000
y 0.000 4.676 0.000
z 0.000 0.000 1.801


<r2> (average value of r2) Å2
<r2> 225.272
(<r2>)1/2 15.009