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

using model chemistry: B3LYP/STO-3G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 2A'
Energy calculated at B3LYP/STO-3G
 hartrees
Energy at 0K-5130.156498
Energy at 298.15K 
HF Energy-5130.156498
Nuclear repulsion energy331.999260
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 B3LYP/STO-3G
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' 3396 3030 0.49 43.59 0.40 0.57
2 A' 663 592 14.52 5.10 0.28 0.44
3 A' 424 378 14.46 6.19 0.15 0.25
4 A' 198 177 0.36 2.81 0.62 0.77
5 A" 1321 1179 77.64 5.85 0.75 0.86
6 A" 889 793 111.11 2.52 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 3445.0 cm-1
Scaled (by 0.8924) Zero Point Vibrational Energy (zpe) 3074.3 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 B3LYP/STO-3G
ABC
1.31141 0.03929 0.03818

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/STO-3G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.006 0.815 0.000
H2 -0.490 1.799 0.000
Br3 0.006 -0.096 1.648
Br4 0.006 -0.096 -1.648

Atom - Atom Distances (Å)
  C1 H2 Br3 Br4
C11.10161.88331.8833
H21.10162.55972.5597
Br31.88332.55973.2967
Br41.88332.55973.2967

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 115.580 H2 C1 Br4 115.580
Br3 C1 Br4 122.151
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/STO-3G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.212      
2 H 0.093      
3 Br 0.060      
4 Br 0.060      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.399 0.558 0.000 0.686
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -38.538 -0.550 0.000
y -0.550 -37.474 0.000
z 0.000 0.000 -39.116
Traceless
 xyz
x -0.244 -0.550 0.000
y -0.550 1.353 0.000
z 0.000 0.000 -1.110
Polar
3z2-r2-2.219
x2-y2-1.065
xy-0.550
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 0.605 -0.150 0.000
y -0.150 1.689 0.000
z 0.000 0.000 5.322


<r2> (average value of r2) Å2
<r2> 222.273
(<r2>)1/2 14.909