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All results from a given calculation for CH2Br2 (dibromomethane)

using model chemistry: B3PW91/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 B3PW91/cc-pVTZ
 hartrees
Energy at 0K-5187.732768
Energy at 298.15K 
HF Energy-5187.732768
Nuclear repulsion energy351.363725
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 B3PW91/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 3137 3017 1.65      
2 A1 1431 1376 0.01      
3 A1 592 569 3.64      
4 A1 171 164 0.09      
5 A2 1117 1074 0.00      
6 B1 3223 3100 1.71      
7 B1 818 786 4.59      
8 B2 1215 1168 62.16      
9 B2 653 628 99.80      

Unscaled Zero Point Vibrational Energy (zpe) 6177.7 cm-1
Scaled (by 0.9616) Zero Point Vibrational Energy (zpe) 5940.5 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 B3PW91/cc-pVTZ
ABC
0.89066 0.04060 0.03912

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/cc-pVTZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.928
H2 -0.899 0.000 1.531
H3 0.899 0.000 1.531
Br4 0.000 1.619 -0.123
Br5 0.000 -1.619 -0.123

Atom - Atom Distances (Å)
  C1 H2 H3 Br4 Br5
C11.08251.08251.93021.9302
H21.08251.79732.48322.4832
H31.08251.79732.48322.4832
Br41.93022.48322.48323.2376
Br51.93022.48322.48323.2376

picture of dibromomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H2 C1 H3 112.238 H2 C1 Br4 107.675
H2 C1 Br5 107.675 H3 C1 Br4 107.675
H3 C1 Br5 107.675 Br4 C1 Br5 114.002
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.156      
2 H 0.141      
3 H 0.141      
4 Br -0.063      
5 Br -0.063      


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 1.518 1.518
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -42.982 0.000 0.000
y 0.000 -44.457 0.000
z 0.000 0.000 -40.618
Traceless
 xyz
x -0.445 0.000 0.000
y 0.000 -2.657 0.000
z 0.000 0.000 3.102
Polar
3z2-r26.203
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 5.161 0.000 0.000
y 0.000 10.211 0.000
z 0.000 0.000 6.148


<r2> (average value of r2) Å2
<r2> 222.635
(<r2>)1/2 14.921