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All results from a given calculation for CH2Br (bromomethyl radical)

using model chemistry: B3PW91/STO-3G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 2A'
1 2 no C2V 2A1

Conformer 1 (CS)

Jump to S1C2
Energy calculated at B3PW91/STO-3G
 hartrees
Energy at 0K-2584.782895
Energy at 298.15K-2584.786843
HF Energy-2584.782895
Nuclear repulsion energy80.287998
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/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' 3386 2997 0.75      
2 A' 1548 1370 22.80      
3 A' 814 721 22.53      
4 A' 431 381 32.17      
5 A" 3574 3163 0.07      
6 A" 1020 902 0.94      

Unscaled Zero Point Vibrational Energy (zpe) 5386.3 cm-1
Scaled (by 0.885) Zero Point Vibrational Energy (zpe) 4766.9 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/STO-3G
ABC
9.05212 0.37425 0.36042

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/STO-3G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.010 1.489 0.000
Br2 -0.010 -0.370 0.000
H3 0.197 2.006 0.944
H4 0.197 2.006 -0.944

Atom - Atom Distances (Å)
  C1 Br2 H3 H4
C11.85931.09541.0954
Br21.85932.56472.5647
H31.09542.56471.8874
H41.09542.56471.8874

picture of bromomethyl radical state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
Br2 C1 H3 118.135 Br2 C1 H4 118.135
H3 C1 H4 118.974
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/STO-3G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.218      
2 Br 0.044      
3 H 0.087      
4 H 0.087      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.274 0.772 0.000 0.819
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -23.046 0.508 0.000
y 0.508 -21.245 0.000
z 0.000 0.000 -22.203
Traceless
 xyz
x -1.322 0.508 0.000
y 0.508 1.380 0.000
z 0.000 0.000 -0.057
Polar
3z2-r2-0.115
x2-y2-1.801
xy0.508
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 0.437 0.072 0.000
y 0.072 2.947 0.000
z 0.000 0.000 0.899


<r2> (average value of r2) Å2
<r2> 41.853
(<r2>)1/2 6.469

Conformer 2 (C2V)

Jump to S1C1
Energy calculated at B3PW91/STO-3G
 hartrees
Energy at 0K-2584.782645
Energy at 298.15K 
HF Energy-2584.782645
Nuclear repulsion energy80.411337
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/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 A1 3403 3012 0.96 36.39 0.13 0.23
2 A1 1539 1362 25.52 7.70 0.75 0.86
3 A1 806 713 21.44 6.05 0.34 0.51
4 B1 316i 280i 46.92 0.19 0.75 0.86
5 B2 3595 3181 0.02 27.98 0.75 0.86
6 B2 1000 885 0.78 4.52 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 5013.4 cm-1
Scaled (by 0.885) Zero Point Vibrational Energy (zpe) 4436.9 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/STO-3G
ABC
9.26067 0.37537 0.36075

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/STO-3G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.484
Br2 0.000 0.000 0.370
H3 0.000 0.950 -2.024
H4 0.000 -0.950 -2.024

Atom - Atom Distances (Å)
  C1 Br2 H3 H4
C11.85391.09311.0931
Br21.85392.57572.5757
H31.09312.57571.9006
H41.09312.57571.9006

picture of bromomethyl radical state 1 conformation 2
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
Br2 C1 H3 119.609 Br2 C1 H4 119.609
H3 C1 H4 120.782
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/STO-3G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.225      
2 Br 0.048      
3 H 0.088      
4 H 0.088      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.000 0.000 -0.775 0.775
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -23.110 0.000 0.000
y 0.000 -22.151 0.000
z 0.000 0.000 -21.145
Traceless
 xyz
x -1.462 0.000 0.000
y 0.000 -0.024 0.000
z 0.000 0.000 1.486
Polar
3z2-r22.971
x2-y2-0.959
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 0.421 0.000 0.000
y 0.000 0.896 0.000
z 0.000 0.000 2.915


<r2> (average value of r2) Å2
<r2> 41.828
(<r2>)1/2 6.467