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

using model chemistry: PBEPBEultrafine/cc-pVTZ

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/cc-pVTZ
 hartrees
Energy at 0K-5186.238561
Energy at 298.15K 
HF Energy-5186.238561
Nuclear repulsion energy336.441091
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/cc-pVTZ
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' 3144 3122 0.62 101.06 0.26 0.41
2 A' 612 608 6.34 6.07 0.22 0.36
3 A' 397 394 25.81 13.07 0.08 0.15
4 A' 181 179 0.12 4.04 0.50 0.66
5 A" 1134 1127 49.74 1.01 0.75 0.86
6 A" 751 746 134.72 1.53 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 3109.2 cm-1
Scaled (by 0.9931) Zero Point Vibrational Energy (zpe) 3087.7 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 PBEPBEultrafine/cc-pVTZ
ABC
1.28173 0.04061 0.03940

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.006 0.829 0.000
H2 -0.484 1.799 0.000
Br3 0.006 -0.097 1.621
Br4 0.006 -0.097 -1.621

Atom - Atom Distances (Å)
  C1 H2 Br3 Br4
C11.08711.86701.8670
H21.08712.54232.5423
Br31.86702.54233.2428
Br41.86702.54233.2428

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 116.258 H2 C1 Br4 116.258
Br3 C1 Br4 120.557
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBEultrafine/cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.223      
2 H 0.140      
3 Br 0.041      
4 Br 0.041      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.435 0.555 0.000 0.705
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -43.402 -0.918 0.000
y -0.918 -40.848 0.000
z 0.000 0.000 -41.173
Traceless
 xyz
x -2.392 -0.918 0.000
y -0.918 1.440 0.000
z 0.000 0.000 0.952
Polar
3z2-r21.904
x2-y2-2.555
xy-0.918
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.709 -0.129 0.000
y -0.129 6.035 0.000
z 0.000 0.000 11.272


<r2> (average value of r2) Å2
<r2> 218.383
(<r2>)1/2 14.778