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All results from a given calculation for CHBr2 (dibromomethyl radical)

using model chemistry: PBEPBE/TZVP

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 2A'
Energy calculated at PBEPBE/TZVP
 hartrees
Energy at 0K-5186.139035
Energy at 298.15K 
HF Energy-5186.139035
Nuclear repulsion energy335.164621
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 PBEPBE/TZVP
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A' 3152 3117 0.73 106.29 0.27 0.43
2 A' 606 599 7.42 5.53 0.32 0.48
3 A' 390 386 31.35 11.25 0.06 0.12
4 A' 181 179 0.14 5.19 0.54 0.71
5 A" 1147 1134 50.33 1.28 0.75 0.86
6 A" 738 730 151.43 2.83 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 3107.4 cm-1
Scaled (by 0.9888) Zero Point Vibrational Energy (zpe) 3072.6 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 PBEPBE/TZVP
ABC
1.28301 0.04026 0.03906

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBE/TZVP

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.006 0.828 0.000
H2 -0.480 1.801 0.000
Br3 0.006 -0.097 1.629
Br4 0.006 -0.097 -1.629

Atom - Atom Distances (Å)
  C1 H2 Br3 Br4
C11.08811.87281.8728
H21.08812.54782.5478
Br31.87282.54783.2570
Br41.87282.54783.2570

picture of dibromomethyl radical state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H2 C1 Br3 116.209 H2 C1 Br4 116.209
Br3 C1 Br4 120.819
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/TZVP Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.227      
2 H 0.191      
3 Br 0.018      
4 Br 0.018      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.485 0.535 0.000 0.722
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -43.621 -1.011 0.000
y -1.011 -40.930 0.000
z 0.000 0.000 -41.076
Traceless
 xyz
x -2.618 -1.011 0.000
y -1.011 1.419 0.000
z 0.000 0.000 1.199
Polar
3z2-r22.398
x2-y2-2.692
xy-1.011
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.137 -0.100 0.000
y -0.100 5.484 0.000
z 0.000 0.000 10.944


<r2> (average value of r2) Å2
<r2> 220.044
(<r2>)1/2 14.834