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All results from a given calculation for CH2Br2 (dibromomethane)

using model chemistry: LSDA/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 LSDA/cc-pVDZ
 hartrees
Energy at 0K-5181.715896
Energy at 298.15K 
HF Energy-5181.715896
Nuclear repulsion energy352.833059
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/cc-pVDZ
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 3054 3020 0.59      
2 A1 1338 1323 0.47      
3 A1 596 589 3.28      
4 A1 170 168 0.07      
5 A2 1052 1041 0.00      
6 B1 3147 3113 3.94      
7 B1 778 770 6.76      
8 B2 1139 1127 47.39      
9 B2 656 649 110.95      

Unscaled Zero Point Vibrational Energy (zpe) 5965.0 cm-1
Scaled (by 0.989) Zero Point Vibrational Energy (zpe) 5899.3 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 LSDA/cc-pVDZ
ABC
0.89342 0.04100 0.03951

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.921
H2 -0.914 0.000 1.540
H3 0.914 0.000 1.540
Br4 0.000 1.611 -0.123
Br5 0.000 -1.611 -0.123

Atom - Atom Distances (Å)
  C1 H2 H3 Br4 Br5
C11.10381.10381.91941.9194
H21.10381.82772.48902.4890
H31.10381.82772.48902.4890
Br41.91942.48902.48903.2214
Br51.91942.48902.48903.2214

picture of dibromomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H2 C1 H3 111.766 H2 C1 Br4 107.762
H2 C1 Br5 107.762 H3 C1 Br4 107.762
H3 C1 Br5 107.762 Br4 C1 Br5 114.103
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at LSDA/cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.278      
2 H 0.163      
3 H 0.163      
4 Br -0.024      
5 Br -0.024      


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 1.435 1.435
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -42.556 0.000 0.000
y 0.000 -43.507 0.000
z 0.000 0.000 -40.250
Traceless
 xyz
x -0.677 0.000 0.000
y 0.000 -2.104 0.000
z 0.000 0.000 2.781
Polar
3z2-r25.563
x2-y20.951
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.933 0.000 0.000
y 0.000 8.898 0.000
z 0.000 0.000 5.008


<r2> (average value of r2) Å2
<r2> 220.459
(<r2>)1/2 14.848