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

using model chemistry: PBEPBEultrafine/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 PBEPBEultrafine/cc-pVDZ
 hartrees
Energy at 0K-5186.077837
Energy at 298.15K 
HF Energy-5186.077837
Nuclear repulsion energy335.055543
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-pVDZ
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A' 3134 3116 1.06 112.46 0.27 0.42
2 A' 617 613 9.83 6.61 0.40 0.57
3 A' 438 435 25.79 13.86 0.06 0.11
4 A' 181 180 0.08 5.16 0.53 0.70
5 A" 1119 1112 46.44 2.78 0.75 0.86
6 A" 745 740 144.26 2.13 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 3116.4 cm-1
Scaled (by 0.9942) Zero Point Vibrational Energy (zpe) 3098.3 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 PBEPBEultrafine/cc-pVDZ
ABC
1.25405 0.04035 0.03914

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.007 0.840 0.000
H2 -0.545 1.792 0.000
Br3 0.007 -0.098 1.626
Br4 0.007 -0.098 -1.626

Atom - Atom Distances (Å)
  C1 H2 Br3 Br4
C11.10051.87741.8774
H21.10052.55372.5537
Br31.87742.55373.2529
Br41.87742.55373.2529

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 115.604 H2 C1 Br4 115.604
Br3 C1 Br4 120.071
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBEultrafine/cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.221      
2 H 0.116      
3 Br 0.052      
4 Br 0.052      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.530 0.453 0.000 0.697
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -42.934 -1.017 0.000
y -1.017 -40.507 0.000
z 0.000 0.000 -40.301
Traceless
 xyz
x -2.530 -1.017 0.000
y -1.017 1.111 0.000
z 0.000 0.000 1.419
Polar
3z2-r22.837
x2-y2-2.427
xy-1.017
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.365 -0.214 0.000
y -0.214 4.900 0.000
z 0.000 0.000 9.989


<r2> (average value of r2) Å2
<r2> 219.351
(<r2>)1/2 14.811