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All results from a given calculation for CH2Br2 (dibromomethane)

using model chemistry: B3LYP/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 B3LYP/cc-pVTZ
 hartrees
Energy at 0K-5187.780362
Energy at 298.15K 
HF Energy-5187.780362
Nuclear repulsion energy348.629750
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 B3LYP/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 3135 3030 1.83      
2 A1 1438 1390 0.03      
3 A1 573 554 3.82      
4 A1 168 162 0.07      
5 A2 1113 1076 0.00      
6 B1 3220 3112 1.38      
7 B1 817 789 4.42      
8 B2 1218 1177 67.74      
9 B2 621 600 106.08      

Unscaled Zero Point Vibrational Energy (zpe) 6150.5 cm-1
Scaled (by 0.9666) Zero Point Vibrational Energy (zpe) 5945.1 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 B3LYP/cc-pVTZ
ABC
0.88260 0.03991 0.03847

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/cc-pVTZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.934
H2 -0.898 0.000 1.535
H3 0.898 0.000 1.535
Br4 0.000 1.633 -0.124
Br5 0.000 -1.633 -0.124

Atom - Atom Distances (Å)
  C1 H2 H3 Br4 Br5
C11.08051.08051.94541.9454
H21.08051.79622.49462.4946
H31.08051.79622.49462.4946
Br41.94542.49462.49463.2655
Br51.94542.49462.49463.2655

picture of dibromomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H2 C1 H3 112.444 H2 C1 Br4 107.595
H2 C1 Br5 107.595 H3 C1 Br4 107.595
H3 C1 Br5 107.595 Br4 C1 Br5 114.125
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.177      
2 H 0.148      
3 H 0.148      
4 Br -0.059      
5 Br -0.059      


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 1.519 1.519
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -43.326 0.000 0.000
y 0.000 -44.823 0.000
z 0.000 0.000 -40.958
Traceless
 xyz
x -0.435 0.000 0.000
y 0.000 -2.681 0.000
z 0.000 0.000 3.116
Polar
3z2-r26.232
x2-y21.498
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.163 0.000 0.000
y 0.000 10.391 0.000
z 0.000 0.000 6.175


<r2> (average value of r2) Å2
<r2> 226.116
(<r2>)1/2 15.037