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

using model chemistry: PBE1PBE/3-21G*

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 PBE1PBE/3-21G*
 hartrees
Energy at 0K-2600.691153
Energy at 298.15K-2600.694967
HF Energy-2600.691153
Nuclear repulsion energy80.716052
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 PBE1PBE/3-21G*
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' 3203 3074 4.44      
2 A' 1428 1371 17.18      
3 A' 744 714 18.06      
4 A' 263 253 110.71      
5 A" 3358 3223 0.00      
6 A" 950 912 3.26      

Unscaled Zero Point Vibrational Energy (zpe) 4972.4 cm-1
Scaled (by 0.9598) Zero Point Vibrational Energy (zpe) 4772.5 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 PBE1PBE/3-21G*
ABC
9.20811 0.37839 0.36345

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBE1PBE/3-21G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.000 1.484 0.000
Br2 -0.000 -0.368 0.000
H3 0.000 1.992 0.953
H4 0.000 1.992 -0.953

Atom - Atom Distances (Å)
  C1 Br2 H3 H4
C11.85191.08011.0801
Br21.85192.54542.5454
H31.08012.54541.9061
H41.08012.54541.9061

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 118.074 Br2 C1 H4 118.074
H3 C1 H4 123.852
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBE1PBE/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.486      
2 Br -0.011      
3 H 0.248      
4 H 0.248      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.001 0.885 0.000 0.885
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -25.944 0.002 0.000
y 0.002 -21.128 0.000
z 0.000 0.000 -23.884
Traceless
 xyz
x -3.438 0.002 0.000
y 0.002 3.786 0.000
z 0.000 0.000 -0.348
Polar
3z2-r2-0.696
x2-y2-4.816
xy0.002
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.941 0.000 0.000
y 0.000 5.124 0.000
z 0.000 0.000 2.786


<r2> (average value of r2) Å2
<r2> 42.479
(<r2>)1/2 6.518

Conformer 2 (C2V)

Jump to S1C1
Energy calculated at PBE1PBE/3-21G*
 hartrees
Energy at 0K-2600.691133
Energy at 298.15K 
HF Energy-2600.691133
Nuclear repulsion energy80.701679
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 PBE1PBE/3-21G*
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 3202 3073 4.41 97.90 0.12 0.21
2 A1 1428 1370 17.15 3.30 0.61 0.76
3 A1 738 708 18.12 7.10 0.25 0.40
4 B1 262 251 110.70 0.37 0.75 0.86
5 B2 3357 3222 0.00 54.14 0.75 0.86
6 B2 950 912 3.27 4.65 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 4968.0 cm-1
Scaled (by 0.9598) Zero Point Vibrational Energy (zpe) 4768.3 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 PBE1PBE/3-21G*
ABC
9.20859 0.37824 0.36332

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBE1PBE/3-21G*

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 0.368
H3 0.000 0.953 -1.992
H4 0.000 -0.953 -1.992

Atom - Atom Distances (Å)
  C1 Br2 H3 H4
C11.85231.08001.0800
Br21.85232.54572.5457
H31.08002.54571.9060
H41.08002.54571.9060

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 118.070 Br2 C1 H4 118.070
H3 C1 H4 123.859
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBE1PBE/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.486      
2 Br -0.011      
3 H 0.248      
4 H 0.248      


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 -0.886 0.886
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -25.944 0.000 0.000
y 0.000 -23.884 0.000
z 0.000 0.000 -21.126
Traceless
 xyz
x -3.439 0.000 0.000
y 0.000 -0.349 0.000
z 0.000 0.000 3.788
Polar
3z2-r27.577
x2-y2-2.060
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.941 0.000 0.000
y 0.000 2.786 0.000
z 0.000 0.000 5.125


<r2> (average value of r2) Å2
<r2> 42.488
(<r2>)1/2 6.518