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All results from a given calculation for CH2Br2 (dibromomethane)

using model chemistry: B2PLYP/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 B2PLYP/cc-pVTZ
 hartrees
Energy at 0K-5186.888943
Energy at 298.15K-5186.896977
HF Energy-5186.684580
Nuclear repulsion energy350.854785
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 B2PLYP/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 3148 3021 2.07      
2 A1 1452 1393 0.04      
3 A1 589 565 3.76      
4 A1 171 164 0.08      
5 A2 1128 1082 0.00      
6 B1 3233 3102 1.36      
7 B1 827 794 4.20      
8 B2 1230 1180 67.53      
9 B2 656 629 92.63      

Unscaled Zero Point Vibrational Energy (zpe) 6217.7 cm-1
Scaled (by 0.9594) Zero Point Vibrational Energy (zpe) 5965.3 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 B2PLYP/cc-pVTZ
ABC
0.88494 0.04050 0.03902

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP/cc-pVTZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.934
H2 -0.892 0.000 1.545
H3 0.892 0.000 1.545
Br4 0.000 1.618 -0.124
Br5 0.000 -1.618 -0.124

Atom - Atom Distances (Å)
  C1 H2 H3 Br4 Br5
C11.08151.08151.93351.9335
H21.08151.78472.49012.4901
H31.08151.78472.49012.4901
Br41.93352.49012.49013.2370
Br51.93352.49012.49013.2370

picture of dibromomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H2 C1 H3 111.202 H2 C1 Br4 108.004
H2 C1 Br5 108.004 H3 C1 Br4 108.004
H3 C1 Br5 108.004 Br4 C1 Br5 113.662
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B2PLYP/cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.184      
2 H 0.154      
3 H 0.154      
4 Br -0.062      
5 Br -0.062      


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 1.512 1.512
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -43.370 0.000 0.000
y 0.000 -44.845 0.000
z 0.000 0.000 -41.007
Traceless
 xyz
x -0.444 0.000 0.000
y 0.000 -2.657 0.000
z 0.000 0.000 3.101
Polar
3z2-r26.202
x2-y21.475
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.094 0.000 0.000
y 0.000 10.079 0.000
z 0.000 0.000 6.098


<r2> (average value of r2) Å2
<r2> 223.384
(<r2>)1/2 14.946