return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

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

using model chemistry: B2PLYP/Def2TZVPP

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 2A'
Energy calculated at B2PLYP/Def2TZVPP
 hartrees
Energy at 0K-5186.165979
Energy at 298.15K 
HF Energy-5185.941253
Nuclear repulsion energy338.080593
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 B2PLYP/Def2TZVPP
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' 3244 3244 0.82 94.87 0.23 0.38
2 A' 629 629 6.65 4.60 0.18 0.30
3 A' 419 419 23.13 9.82 0.08 0.15
4 A' 187 187 0.10 3.22 0.47 0.64
5 A" 1194 1194 59.04 0.33 0.75 0.86
6 A" 782 782 122.13 1.42 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 3227.3 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 3227.3 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 B2PLYP/Def2TZVPP
ABC
1.29095 0.04102 0.03979

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP/Def2TZVPP

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.006 0.826 0.000
H2 -0.462 1.796 0.000
Br3 0.006 -0.096 1.613
Br4 0.006 -0.096 -1.613

Atom - Atom Distances (Å)
  C1 H2 Br3 Br4
C11.07661.85851.8585
H21.07662.53022.5302
Br31.85852.53023.2266
Br41.85852.53023.2266

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 116.553 H2 C1 Br4 116.553
Br3 C1 Br4 120.466
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B2PLYP/Def2TZVPP Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.173      
2 H 0.135      
3 Br 0.019      
4 Br 0.019      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.403 0.648 0.000 0.764
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -43.573 -0.886 0.001
y -0.886 -40.919 0.004
z 0.001 0.004 -41.688
Traceless
 xyz
x -2.269 -0.886 0.001
y -0.886 1.711 0.004
z 0.001 0.004 0.558
Polar
3z2-r21.116
x2-y2-2.653
xy-0.886
xz0.001
yz0.004


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.169 -0.081 0.000
y -0.081 6.241 0.002
z 0.000 0.002 10.893


<r2> (average value of r2) Å2
<r2> 216.650
(<r2>)1/2 14.719