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All results from a given calculation for CH2Br2 (dibromomethane)

using model chemistry: PBEPBE/cc-pVDZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at PBEPBE/cc-pVDZ
 hartrees
Energy at 0K-5186.731945
Energy at 298.15K 
HF Energy-5186.731945
Nuclear repulsion energy347.394365
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 PBEPBE/cc-pVDZ
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A1 3057 3039 2.19      
2 A1 1354 1346 0.02      
3 A1 566 563 3.75      
4 A1 164 164 0.06      
5 A2 1058 1052 0.00      
6 B1 3154 3135 1.15      
7 B1 780 776 5.57      
8 B2 1151 1144 59.92      
9 B2 603 600 120.30      

Unscaled Zero Point Vibrational Energy (zpe) 5943.3 cm-1
Scaled (by 0.9942) Zero Point Vibrational Energy (zpe) 5908.8 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 PBEPBE/cc-pVDZ
ABC
0.87766 0.03964 0.03821

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.933
H2 -0.916 0.000 1.545
H3 0.916 0.000 1.545
Br4 0.000 1.638 -0.124
Br5 0.000 -1.638 -0.124

Atom - Atom Distances (Å)
  C1 H2 H3 Br4 Br5
C11.10201.10201.94941.9494
H21.10201.83152.51202.5120
H31.10201.83152.51202.5120
Br41.94942.51202.51203.2766
Br51.94942.51202.51203.2766

picture of dibromomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H2 C1 H3 112.404 H2 C1 Br4 107.547
H2 C1 Br5 107.547 H3 C1 Br4 107.547
H3 C1 Br5 107.547 Br4 C1 Br5 114.361
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.196      
2 H 0.131      
3 H 0.131      
4 Br -0.034      
5 Br -0.034      


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 1.419 1.419
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -42.729 0.000 0.000
y 0.000 -43.608 0.000
z 0.000 0.000 -40.415
Traceless
 xyz
x -0.718 0.000 0.000
y 0.000 -2.036 0.000
z 0.000 0.000 2.754
Polar
3z2-r25.507
x2-y20.879
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.980 0.000 0.000
y 0.000 9.252 0.000
z 0.000 0.000 5.081


<r2> (average value of r2) Å2
<r2> 227.017
(<r2>)1/2 15.067