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All results from a given calculation for CH2Br2 (dibromomethane)

using model chemistry: B3LYP/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 B3LYP/3-21G*
 hartrees
Energy at 0K-5163.170111
Energy at 298.15K 
HF Energy-5163.170111
Nuclear repulsion energy349.181735
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 B3LYP/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 3145 3025 3.35      
2 A1 1493 1436 0.00      
3 A1 586 563 4.06      
4 A1 167 160 0.06      
5 A2 1144 1100 0.00      
6 B1 3229 3106 0.05      
7 B1 823 791 7.54      
8 B2 1247 1199 55.36      
9 B2 636 612 91.29      

Unscaled Zero Point Vibrational Energy (zpe) 6233.6 cm-1
Scaled (by 0.962) Zero Point Vibrational Energy (zpe) 5996.7 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 B3LYP/3-21G*
ABC
0.85006 0.04034 0.03880

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/3-21G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.955
H2 -0.902 0.000 1.559
H3 0.902 0.000 1.559
Br4 0.000 1.624 -0.126
Br5 0.000 -1.624 -0.126

Atom - Atom Distances (Å)
  C1 H2 H3 Br4 Br5
C11.08591.08591.95091.9509
H21.08591.80382.50852.5085
H31.08591.80382.50852.5085
Br41.95092.50852.50853.2480
Br51.95092.50852.50853.2480

picture of dibromomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H2 C1 H3 112.311 H2 C1 Br4 107.975
H2 C1 Br5 107.975 H3 C1 Br4 107.975
H3 C1 Br5 107.975 Br4 C1 Br5 112.701
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.494      
2 H 0.271      
3 H 0.271      
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 1.458 1.458
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -42.389 0.000 0.000
y 0.000 -43.126 0.000
z 0.000 0.000 -39.786
Traceless
 xyz
x -0.932 0.000 0.000
y 0.000 -2.039 0.000
z 0.000 0.000 2.971
Polar
3z2-r25.943
x2-y20.738
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.963 0.000 0.000
y 0.000 8.529 0.000
z 0.000 0.000 4.886


<r2> (average value of r2) Å2
<r2> 223.779
(<r2>)1/2 14.959