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

using model chemistry: mPW1PW91/aug-cc-pVDZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 2A'
Energy calculated at mPW1PW91/aug-cc-pVDZ
 hartrees
Energy at 0K-5187.277248
Energy at 298.15K 
HF Energy-5187.277248
Nuclear repulsion energy338.394054
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 mPW1PW91/aug-cc-pVDZ
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' 3240 3105 1.21 94.75 0.21 0.35
2 A' 633 607 6.14 6.18 0.08 0.14
3 A' 423 406 22.34 9.92 0.12 0.22
4 A' 188 180 0.10 2.64 0.41 0.58
5 A" 1174 1125 57.48 0.11 0.75 0.86
6 A" 788 756 125.07 1.07 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 3222.8 cm-1
Scaled (by 0.9583) Zero Point Vibrational Energy (zpe) 3088.4 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 mPW1PW91/aug-cc-pVDZ
ABC
1.26876 0.04121 0.03994

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/aug-cc-pVDZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.006 0.834 0.000
H2 -0.486 1.804 0.000
Br3 0.006 -0.097 1.610
Br4 0.006 -0.097 -1.610

Atom - Atom Distances (Å)
  C1 H2 Br3 Br4
C11.08801.85951.8595
H21.08802.53932.5393
Br31.85952.53933.2192
Br41.85952.53933.2192

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 116.516 H2 C1 Br4 116.516
Br3 C1 Br4 119.904
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/aug-cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.526      
2 H -0.189      
3 Br 0.357      
4 Br 0.357      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.410 0.689 0.000 0.802
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -43.594 -0.964 0.000
y -0.964 -40.657 0.000
z 0.000 0.000 -41.428
Traceless
 xyz
x -2.551 -0.964 0.000
y -0.964 1.854 0.000
z 0.000 0.000 0.697
Polar
3z2-r21.395
x2-y2-2.937
xy-0.964
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.110 -0.057 0.000
y -0.057 6.986 0.000
z 0.000 0.000 11.464


<r2> (average value of r2) Å2
<r2> 215.853
(<r2>)1/2 14.692