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

using model chemistry: PBEPBEultrafine/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 PBEPBEultrafine/Def2TZVPP
 hartrees
Energy at 0K-5186.148261
Energy at 298.15K 
HF Energy-5186.148261
Nuclear repulsion energy336.670137
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 PBEPBEultrafine/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' 3145 3145 0.63 100.65 0.25 0.39
2 A' 612 612 5.76 5.32 0.16 0.28
3 A' 387 387 25.20 11.68 0.09 0.16
4 A' 181 181 0.13 3.78 0.47 0.64
5 A" 1135 1135 48.86 0.49 0.75 0.86
6 A" 753 753 131.08 1.80 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 3106.0 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 3106.0 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 PBEPBEultrafine/Def2TZVPP
ABC
1.28626 0.04065 0.03944

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.006 0.827 0.000
H2 -0.475 1.802 0.000
Br3 0.006 -0.097 1.621
Br4 0.006 -0.097 -1.621

Atom - Atom Distances (Å)
  C1 H2 Br3 Br4
C11.08741.86511.8651
H21.08742.54192.5419
Br31.86512.54193.2410
Br41.86512.54193.2410

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 116.352 H2 C1 Br4 116.352
Br3 C1 Br4 120.654
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBEultrafine/Def2TZVPP Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.175      
2 H 0.135      
3 Br 0.020      
4 Br 0.020      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.415 0.550 0.000 0.688
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -43.396 -0.921 0.000
y -0.921 -40.838 0.000
z 0.000 0.000 -41.222
Traceless
 xyz
x -2.366 -0.921 0.000
y -0.921 1.471 0.000
z 0.000 0.000 0.895
Polar
3z2-r21.790
x2-y2-2.557
xy-0.921
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.347 -0.089 0.000
y -0.089 6.475 0.000
z 0.000 0.000 11.596


<r2> (average value of r2) Å2
<r2> 218.171
(<r2>)1/2 14.771