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All results from a given calculation for CH2Br2 (dibromomethane)

using model chemistry: B1B95/CEP-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 B1B95/CEP-31G
 hartrees
Energy at 0K-33.500897
Energy at 298.15K 
HF Energy-33.500897
Nuclear repulsion energy32.713189
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 B1B95/CEP-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 3163 3028 11.70      
2 A1 1427 1367 0.00      
3 A1 560 536 4.58      
4 A1 163 156 0.08      
5 A2 1107 1060 0.00      
6 B1 3272 3133 1.56      
7 B1 823 788 14.18      
8 B2 1244 1191 69.48      
9 B2 632 606 119.54      

Unscaled Zero Point Vibrational Energy (zpe) 6195.2 cm-1
Scaled (by 0.9575) Zero Point Vibrational Energy (zpe) 5931.9 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 B1B95/CEP-31G
ABC
0.85214 0.03833 0.03695

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/CEP-31G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.952
H2 -0.910 0.000 1.559
H3 0.910 0.000 1.559
Br4 0.000 1.666 -0.126
Br5 0.000 -1.666 -0.126

Atom - Atom Distances (Å)
  C1 H2 H3 Br4 Br5
C11.09381.09381.98441.9844
H21.09381.81982.53832.5383
H31.09381.81982.53832.5383
Br41.98442.53832.53833.3323
Br51.98442.53832.53833.3323

picture of dibromomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H2 C1 H3 112.580 H2 C1 Br4 107.546
H2 C1 Br5 107.546 H3 C1 Br4 107.546
H3 C1 Br5 107.546 Br4 C1 Br5 114.197
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/CEP-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.676      
2 H 0.260      
3 H 0.260      
4 Br 0.078      
5 Br 0.078      


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 1.790 1.790
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -36.547 0.000 0.000
y 0.000 -38.622 0.000
z 0.000 0.000 -34.036
Traceless
 xyz
x -0.218 0.000 0.000
y 0.000 -3.331 0.000
z 0.000 0.000 3.549
Polar
3z2-r27.097
x2-y22.075
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.191 0.000 0.000
y 0.000 8.951 0.000
z 0.000 0.000 3.940


<r2> (average value of r2) Å2
<r2> 71.962
(<r2>)1/2 8.483