return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

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

using model chemistry: HF/cc-pVQZ

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 HF/cc-pVQZ
Rotational Constants (cm-1) from geometry optimized at HF/cc-pVQZ
See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/cc-pVQZ
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (C2V)

Jump to S1C1
Energy calculated at HF/cc-pVQZ
 hartrees
Energy at 0K-2611.464176
Energy at 298.15K 
HF Energy-2611.464176
Nuclear repulsion energy80.509259
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 HF/cc-pVQZ
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 3308 3005 7.50 116.85 0.09 0.16
2 A1 1492 1355 31.90 0.84 0.09 0.17
3 A1 723 657 17.75 13.67 0.18 0.31
4 B1 304i 276i 55.91 0.00 0.75 0.86
5 B2 3466 3148 0.63 52.21 0.75 0.86
6 B2 989 899 0.45 0.96 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 4836.5 cm-1
Scaled (by 0.9084) Zero Point Vibrational Energy (zpe) 4393.5 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 HF/cc-pVQZ
ABC
9.39741 0.37542 0.36100

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.492
Br2 0.000 0.000 0.369
H3 0.000 0.943 -1.990
H4 0.000 -0.943 -1.990

Atom - Atom Distances (Å)
  C1 Br2 H3 H4
C11.86151.06671.0667
Br21.86152.54102.5410
H31.06672.54101.8868
H41.06672.54101.8868

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 117.824 Br2 C1 H4 117.824
H3 C1 H4 124.351
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/cc-pVQZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.216      
2 Br -0.052      
3 H 0.134      
4 H 0.134      


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 -1.452 1.452
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -26.550 0.000 0.000
y 0.000 -24.588 0.000
z 0.000 0.000 -21.637
Traceless
 xyz
x -3.438 0.000 0.000
y 0.000 -0.494 0.000
z 0.000 0.000 3.932
Polar
3z2-r27.864
x2-y2-1.962
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.641 0.000 0.000
y 0.000 3.957 0.000
z 0.000 0.000 5.969


<r2> (average value of r2) Å2
<r2> 42.985
(<r2>)1/2 6.556