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All results from a given calculation for CH2Br2 (dibromomethane)

using model chemistry: B1B95/aug-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 B1B95/aug-cc-pVTZ
 hartrees
Energy at 0K-5188.402441
Energy at 298.15K 
HF Energy-5188.402441
Nuclear repulsion energy353.265870
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 B1B95/aug-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 3157 3026 1.07 95.32 0.04 0.09
2 A1 1437 1378 0.02 9.84 0.52 0.69
3 A1 597 573 3.50 18.09 0.06 0.12
4 A1 170 163 0.09 3.40 0.33 0.50
5 A2 1121 1074 0.00 0.95 0.75 0.86
6 B1 3243 3108 2.90 44.27 0.75 0.86
7 B1 819 785 3.58 0.31 0.75 0.86
8 B2 1216 1165 59.96 0.23 0.75 0.86
9 B2 668 640 93.14 4.15 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 6213.9 cm-1
Scaled (by 0.9585) Zero Point Vibrational Energy (zpe) 5956.0 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 B1B95/aug-cc-pVTZ
ABC
0.89136 0.04111 0.03960

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/aug-cc-pVTZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.928
H2 -0.895 0.000 1.531
H3 0.895 0.000 1.531
Br4 0.000 1.609 -0.123
Br5 0.000 -1.609 -0.123

Atom - Atom Distances (Å)
  C1 H2 H3 Br4 Br5
C11.07931.07931.92161.9216
H21.07931.79002.47502.4750
H31.07931.79002.47502.4750
Br41.92162.47502.47503.2172
Br51.92162.47502.47503.2172

picture of dibromomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H2 C1 H3 112.046 H2 C1 Br4 107.802
H2 C1 Br5 107.802 H3 C1 Br4 107.802
H3 C1 Br5 107.802 Br4 C1 Br5 113.670
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/aug-cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.612      
2 H 0.292      
3 H 0.292      
4 Br 0.014      
5 Br 0.014      


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 1.469 1.469
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -43.048 0.000 0.000
y 0.000 -44.533 0.000
z 0.000 0.000 -40.661
Traceless
 xyz
x -0.450 0.000 0.000
y 0.000 -2.679 0.000
z 0.000 0.000 3.129
Polar
3z2-r26.258
x2-y21.486
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.857 0.000 0.000
y 0.000 11.288 0.000
z 0.000 0.000 7.517


<r2> (average value of r2) Å2
<r2> 220.350
(<r2>)1/2 14.844