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All results from a given calculation for CH2Br2 (dibromomethane)

using model chemistry: HF/cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at HF/cc-pVTZ
 hartrees
Energy at 0K-5183.963417
Energy at 298.15K 
HF Energy-5183.963417
Nuclear repulsion energy352.593533
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 HF/cc-pVTZ
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 3294 2997 3.82 89.62 0.07 0.13
2 A1 1569 1428 0.22 11.44 0.57 0.73
3 A1 625 569 6.73 23.29 0.09 0.17
4 A1 185 169 0.13 4.08 0.41 0.58
5 A2 1227 1117 0.00 2.76 0.75 0.86
6 B1 3380 3076 1.07 47.87 0.75 0.86
7 B1 891 811 3.55 1.05 0.75 0.86
8 B2 1343 1222 93.46 0.68 0.75 0.86
9 B2 718 654 96.37 11.67 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 6615.4 cm-1
Scaled (by 0.9101) Zero Point Vibrational Energy (zpe) 6020.7 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 HF/cc-pVTZ
ABC
0.89016 0.04093 0.03942

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/cc-pVTZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.930
H2 -0.888 0.000 1.530
H3 0.888 0.000 1.530
Br4 0.000 1.612 -0.123
Br5 0.000 -1.612 -0.123

Atom - Atom Distances (Å)
  C1 H2 H3 Br4 Br5
C11.07121.07121.92611.9261
H21.07121.77522.47412.4741
H31.07121.77522.47412.4741
Br41.92612.47412.47413.2246
Br51.92612.47412.47413.2246

picture of dibromomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H2 C1 H3 111.911 H2 C1 Br4 107.835
H2 C1 Br5 107.835 H3 C1 Br4 107.835
H3 C1 Br5 107.835 Br4 C1 Br5 113.665
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.088      
2 H 0.146      
3 H 0.146      
4 Br -0.102      
5 Br -0.102      


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 1.718 1.718
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -43.429 0.000 0.000
y 0.000 -45.451 0.000
z 0.000 0.000 -40.902
Traceless
 xyz
x -0.253 0.000 0.000
y 0.000 -3.285 0.000
z 0.000 0.000 3.538
Polar
3z2-r27.077
x2-y22.021
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.988 0.000 0.000
y 0.000 9.733 0.000
z 0.000 0.000 5.973


<r2> (average value of r2) Å2
<r2> 221.499
(<r2>)1/2 14.883