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: CBS-Q

19 10 17 12 22

States and conformations

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

Conformer 1 (CS)

Jump to S1C2
Energy calculated at CBS-Q
 hartrees
Energy at 0K-2612.025422
Energy at 298.15K-2612.021199
HF Energy-2608.953663
Nuclear repulsion energy80.316552
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 CBS-Q
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' 3328 3328 12.74      
2 A' 1507 1507 38.17      
3 A' 731 731 23.12      
4 A' 489 489 48.29      
5 A" 3479 3479 0.28      
6 A" 1012 1012 0.50      

Unscaled Zero Point Vibrational Energy (zpe) 5272.8 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 5272.8 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 CBS-Q
ABC
9.08957 0.37986 0.36528

See section I.F.4 to change rotational constant units
Geometric Data calculated at CBS-Q

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.010 1.497 0.000
Br2 -0.010 -0.369 0.000
H3 0.196 1.974 0.940
H4 0.196 1.974 -0.940

Atom - Atom Distances (Å)
  C1 Br2 H3 H4
C11.86651.07371.0737
Br21.86652.53312.5331
H31.07372.53311.8798
H41.07372.53311.8798

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 116.366 Br2 C1 H4 116.366
H3 C1 H4 122.169
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (C2V)

Jump to S1C1
Energy calculated at CBS-Q
 hartrees
Energy at 0K-2612.026403
Energy at 298.15K-2612.022443
HF Energy-2608.953374
Nuclear repulsion energy80.430659
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 CBS-Q
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 3342 3342 8.81 110.97 0.12 0.22
2 A1 1501 1501 42.41 1.46 0.71 0.83
3 A1 735 735 19.71 12.57 0.28 0.43
4 B1 367i 367i 69.03 1.23 0.75 0.86
5 B2 3502 3502 0.01 59.87 0.75 0.86
6 B2 994 994 0.61 4.56 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 4853.2 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 4853.2 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 CBS-Q
ABC
9.09014 0.37987 0.36529

See section I.F.4 to change rotational constant units
Geometric Data calculated at CBS-Q

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.492
Br2 0.000 0.000 0.370
H3 0.000 0.946 -1.995
H4 0.000 -0.946 -1.995

Atom - Atom Distances (Å)
  C1 Br2 H3 H4
C11.86191.07191.0719
Br21.86192.54752.5475
H31.07192.54751.8927
H41.07192.54751.8927

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 118.007 Br2 C1 H4 118.007
H3 C1 H4 123.986
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability