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

using model chemistry: PBEPBEultrafine/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 2 yes C2V 2A1

Conformer 1 (CS)

Jump to S1C2
Vibrational Frequencies calculated at PBEPBEultrafine/3-21G
Rotational Constants (cm-1) from geometry optimized at PBEPBEultrafine/3-21G
See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBEultrafine/3-21G
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (C2V)

Jump to S1C1
Energy calculated at PBEPBEultrafine/3-21G
 hartrees
Energy at 0K-2600.347640
Energy at 298.15K 
HF Energy-2600.347640
Nuclear repulsion energy78.583609
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/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 3135 3106 3.08 101.73 0.12 0.21
2 A1 1365 1352 21.00 1.65 0.65 0.79
3 A1 668 662 20.82 9.92 0.37 0.54
4 B1 209 207 146.88 0.07 0.75 0.86
5 B2 3299 3269 0.43 53.40 0.75 0.86
6 B2 890 882 2.95 8.74 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 4781.9 cm-1
Scaled (by 0.9909) Zero Point Vibrational Energy (zpe) 4738.4 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 PBEPBEultrafine/3-21G
ABC
8.97749 0.35745 0.34376

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.531
Br2 0.000 0.000 0.379
H3 0.000 0.965 -2.030
H4 0.000 -0.965 -2.030

Atom - Atom Distances (Å)
  C1 Br2 H3 H4
C11.90991.08621.0862
Br21.90992.59442.5944
H31.08622.59441.9304
H41.08622.59441.9304

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 117.304 Br2 C1 H4 117.304
H3 C1 H4 125.392
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBEultrafine/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.662      
2 Br 0.157      
3 H 0.252      
4 H 0.252      


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 -0.769 0.769
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -26.133 0.000 0.000
y 0.000 -23.968 0.000
z 0.000 0.000 -21.875
Traceless
 xyz
x -3.211 0.000 0.000
y 0.000 0.036 0.000
z 0.000 0.000 3.176
Polar
3z2-r26.351
x2-y2-2.164
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.079 0.000 0.000
y 0.000 1.995 0.000
z 0.000 0.000 5.283


<r2> (average value of r2) Å2
<r2> 44.172
(<r2>)1/2 6.646