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All results from a given calculation for CH2Br2 (dibromomethane)

using model chemistry: mPW1PW91/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at mPW1PW91/3-21G
 hartrees
Energy at 0K-5163.012337
Energy at 298.15K 
HF Energy-5163.012337
Nuclear repulsion energy344.061047
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 mPW1PW91/3-21G
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 3190 3045 2.42      
2 A1 1487 1420 0.75      
3 A1 568 542 4.68      
4 A1 170 162 0.08      
5 A2 1161 1109 0.00      
6 B1 3280 3131 0.09      
7 B1 820 783 10.85      
8 B2 1264 1207 54.66      
9 B2 660 630 101.55      

Unscaled Zero Point Vibrational Energy (zpe) 6299.7 cm-1
Scaled (by 0.9546) Zero Point Vibrational Energy (zpe) 6013.7 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 mPW1PW91/3-21G
ABC
0.86807 0.03879 0.03740

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/3-21G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.942
H2 -0.899 0.000 1.548
H3 0.899 0.000 1.548
Br4 0.000 1.656 -0.125
Br5 0.000 -1.656 -0.125

Atom - Atom Distances (Å)
  C1 H2 H3 Br4 Br5
C11.08431.08431.97031.9703
H21.08431.79832.52022.5202
H31.08431.79832.52022.5202
Br41.97032.52022.52023.3123
Br51.97032.52022.52023.3123

picture of dibromomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H2 C1 H3 112.032 H2 C1 Br4 107.625
H2 C1 Br5 107.625 H3 C1 Br4 107.625
H3 C1 Br5 107.625 Br4 C1 Br5 114.401
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.896      
2 H 0.326      
3 H 0.326      
4 Br 0.122      
5 Br 0.122      


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 1.613 1.613
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -42.655 0.000 0.000
y 0.000 -44.206 0.000
z 0.000 0.000 -40.476
Traceless
 xyz
x -0.315 0.000 0.000
y 0.000 -2.640 0.000
z 0.000 0.000 2.955
Polar
3z2-r25.909
x2-y21.550
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.314 0.000 0.000
y 0.000 8.170 0.000
z 0.000 0.000 3.641


<r2> (average value of r2) Å2
<r2> 231.339
(<r2>)1/2 15.210