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All results from a given calculation for CH2Br2 (dibromomethane)

using model chemistry: BLYP/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 BLYP/3-21G*
 hartrees
Energy at 0K-5163.140145
Energy at 298.15K 
HF Energy-5163.140145
Nuclear repulsion energy344.920744
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 BLYP/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 3065 3045 4.38      
2 A1 1449 1440 0.11      
3 A1 553 550 3.84      
4 A1 157 156 0.05      
5 A2 1098 1091 0.00      
6 B1 3149 3129 0.09      
7 B1 794 789 7.34      
8 B2 1199 1191 56.83      
9 B2 580 577 110.04      

Unscaled Zero Point Vibrational Energy (zpe) 6023.1 cm-1
Scaled (by 0.9935) Zero Point Vibrational Energy (zpe) 5984.0 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 BLYP/3-21G*
ABC
0.83833 0.03928 0.03780

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.962
H2 -0.910 0.000 1.567
H3 0.910 0.000 1.567
Br4 0.000 1.646 -0.127
Br5 0.000 -1.646 -0.127

Atom - Atom Distances (Å)
  C1 H2 H3 Br4 Br5
C11.09281.09281.97351.9735
H21.09281.81942.53142.5314
H31.09281.81942.53142.5314
Br41.97352.53142.53143.2916
Br51.97352.53142.53143.2916

picture of dibromomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H2 C1 H3 112.699 H2 C1 Br4 107.806
H2 C1 Br5 107.806 H3 C1 Br4 107.806
H3 C1 Br5 107.806 Br4 C1 Br5 113.012
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at BLYP/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.471      
2 H 0.257      
3 H 0.257      
4 Br -0.021      
5 Br -0.021      


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 1.407 1.407
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -42.390 0.000 0.000
y 0.000 -42.993 0.000
z 0.000 0.000 -39.831
Traceless
 xyz
x -0.978 0.000 0.000
y 0.000 -1.882 0.000
z 0.000 0.000 2.860
Polar
3z2-r25.720
x2-y20.603
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.009 0.000 0.000
y 0.000 8.955 0.000
z 0.000 0.000 4.948


<r2> (average value of r2) Å2
<r2> 228.933
(<r2>)1/2 15.131