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All results from a given calculation for CH2Br2 (dibromomethane)

using model chemistry: BLYP/6-311G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at BLYP/6-311G**
 hartrees
Energy at 0K-5187.589416
Energy at 298.15K 
HF Energy-5187.589416
Nuclear repulsion energy342.461098
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 BLYP/6-311G**
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 3061 3049 3.16      
2 A1 1391 1385 0.16      
3 A1 535 533 3.69      
4 A1 158 158 0.04      
5 A2 1072 1068 0.00      
6 B1 3149 3137 0.17      
7 B1 785 782 7.02      
8 B2 1179 1174 75.23      
9 B2 549 547 137.51      

Unscaled Zero Point Vibrational Energy (zpe) 5939.0 cm-1
Scaled (by 0.9961) Zero Point Vibrational Energy (zpe) 5915.8 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 BLYP/6-311G**
ABC
0.87093 0.03835 0.03700

See section I.F.4 to change rotational constant units
Geometric Data calculated at BLYP/6-311G**

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.940
H2 -0.908 0.000 1.542
H3 0.908 0.000 1.542
Br4 0.000 1.666 -0.125
Br5 0.000 -1.666 -0.125

Atom - Atom Distances (Å)
  C1 H2 H3 Br4 Br5
C11.08891.08891.97711.9771
H21.08891.81602.52492.5249
H31.08891.81602.52492.5249
Br41.97712.52492.52493.3314
Br51.97712.52492.52493.3314

picture of dibromomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H2 C1 H3 112.990 H2 C1 Br4 107.300
H2 C1 Br5 107.300 H3 C1 Br4 107.300
H3 C1 Br5 107.300 Br4 C1 Br5 114.807
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at BLYP/6-311G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.377      
2 H 0.200      
3 H 0.200      
4 Br -0.012      
5 Br -0.012      


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 1.539 1.539
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -43.558 0.000 0.000
y 0.000 -44.721 0.000
z 0.000 0.000 -41.136
Traceless
 xyz
x -0.630 0.000 0.000
y 0.000 -2.374 0.000
z 0.000 0.000 3.004
Polar
3z2-r26.008
x2-y21.163
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.108 0.000 0.000
y 0.000 10.076 0.000
z 0.000 0.000 5.270


<r2> (average value of r2) Å2
<r2> 233.960
(<r2>)1/2 15.296