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All results from a given calculation for CH2Br2 (dibromomethane)

using model chemistry: LSDA/6-31+G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at LSDA/6-31+G**
 hartrees
Energy at 0K-5176.931818
Energy at 298.15K 
HF Energy-5176.931818
Nuclear repulsion energy355.041744
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 LSDA/6-31+G**
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 3068 3022 0.23      
2 A1 1381 1361 0.33      
3 A1 596 587 2.96      
4 A1 172 170 0.08      
5 A2 1092 1075 0.00      
6 B1 3158 3110 6.01      
7 B1 809 797 6.18      
8 B2 1182 1165 60.82      
9 B2 651 642 111.03      

Unscaled Zero Point Vibrational Energy (zpe) 6054.8 cm-1
Scaled (by 0.985) Zero Point Vibrational Energy (zpe) 5963.9 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 LSDA/6-31+G**
ABC
0.87844 0.04173 0.04016

See section I.F.4 to change rotational constant units
Geometric Data calculated at LSDA/6-31+G**

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.933
H2 -0.909 0.000 1.545
H3 0.909 0.000 1.545
Br4 0.000 1.596 -0.124
Br5 0.000 -1.596 -0.124

Atom - Atom Distances (Å)
  C1 H2 H3 Br4 Br5
C11.09631.09631.91461.9146
H21.09631.81862.48242.4824
H31.09631.81862.48242.4824
Br41.91462.48242.48243.1928
Br51.91462.48242.48243.1928

picture of dibromomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H2 C1 H3 112.081 H2 C1 Br4 107.961
H2 C1 Br5 107.961 H3 C1 Br4 107.961
H3 C1 Br5 107.961 Br4 C1 Br5 112.986
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at LSDA/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.399      
2 H 0.247      
3 H 0.247      
4 Br -0.048      
5 Br -0.048      


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 1.554 1.554
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -43.501 0.000 0.000
y 0.000 -44.773 0.000
z 0.000 0.000 -40.838
Traceless
 xyz
x -0.696 0.000 0.000
y 0.000 -2.603 0.000
z 0.000 0.000 3.299
Polar
3z2-r26.598
x2-y21.271
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.756 0.000 0.000
y 0.000 10.276 0.000
z 0.000 0.000 6.412


<r2> (average value of r2) Å2
<r2> 218.008
(<r2>)1/2 14.765