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

using model chemistry: B3PW91/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 B3PW91/cc-pVTZ
 hartrees
Energy at 0K-5187.069337
Energy at 298.15K 
HF Energy-5187.069337
Nuclear repulsion energy338.427390
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 B3PW91/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
A' 3224 3100 0.85      
A' 624 600 5.55      
A' 383 368 26.92      
A' 186 179 0.17      
A" 1178 1133 57.75      
A" 785 755 123.67      

Unscaled Zero Point Vibrational Energy (zpe) 3189.3 cm-1
Scaled (by 0.9616) Zero Point Vibrational Energy (zpe) 3066.8 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 B3PW91/cc-pVTZ
ABC
1.30157 0.04107 0.03984

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/cc-pVTZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.006 0.821 0.000
H2 -0.435 1.806 0.000
Br3 0.006 -0.096 1.612
Br4 0.006 -0.096 -1.612

Atom - Atom Distances (Å)
  C1 H2 Br3 Br4
C11.07931.85481.8548
H21.07932.53212.5321
Br31.85482.53213.2246
Br41.85482.53213.2246

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 116.824 H2 C1 Br4 116.824
Br3 C1 Br4 120.749
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.209      
2 H 0.151      
3 Br 0.029      
4 Br 0.029      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.392 0.660 0.000 0.768
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -43.238 -0.839 0.000
y -0.839 -40.478 0.000
z 0.000 0.000 -41.199
Traceless
 xyz
x -2.399 -0.839 0.000
y -0.839 1.741 0.000
z 0.000 0.000 0.659
Polar
3z2-r21.318
x2-y2-2.760
xy-0.839
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.618 -0.108 0.000
y -0.108 5.878 0.000
z 0.000 0.000 10.684


<r2> (average value of r2) Å2
<r2> 216.117
(<r2>)1/2 14.701