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

using model chemistry: MP4/3-21G

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 MP4/3-21G
 hartrees
Energy at 0K-2598.945112
Energy at 298.15K-2598.948779
HF Energy-2598.814535
Nuclear repulsion energy77.727937
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 MP4/3-21G
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' 3190 3094        
2 A' 1432 1389        
3 A' 647 628        
4 A' 193 188        
5 A" 3348 3247        
6 A" 912 885        

Unscaled Zero Point Vibrational Energy (zpe) 4861.6 cm-1
Scaled (by 0.9698) Zero Point Vibrational Energy (zpe) 4714.7 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 MP4/3-21G
ABC
9.09373 0.34839 0.33571

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP4/3-21G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.004 1.552 0.000
Br2 0.004 -0.383 0.000
H3 -0.088 2.050 0.955
H4 -0.088 2.050 -0.955

Atom - Atom Distances (Å)
  C1 Br2 H3 H4
C11.93551.08111.0811
Br21.93552.61542.6154
H31.08112.61541.9110
H41.08112.61541.9110

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 117.388 Br2 C1 H4 117.388
H3 C1 H4 124.208
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (C2V)

Jump to S1C1
Energy calculated at MP4/3-21G
 hartrees
Energy at 0K-2598.945099
Energy at 298.15K 
HF Energy-2598.814517
Nuclear repulsion energy77.781578
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 MP4/3-21G
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 3194 3097        
2 A1 1432 1389        
3 A1 648 629        
4 B1 147i 143i        
5 B2 3353 3251        
6 B2 909 881        

Unscaled Zero Point Vibrational Energy (zpe) 4694.1 cm-1
Scaled (by 0.9698) Zero Point Vibrational Energy (zpe) 4552.3 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 MP4/3-21G
ABC
9.13698 0.34889 0.33606

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP4/3-21G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.550
Br2 0.000 0.000 0.383
H3 0.000 0.957 -2.053
H4 0.000 -0.957 -2.053

Atom - Atom Distances (Å)
  C1 Br2 H3 H4
C11.93351.08071.0807
Br21.93352.61722.6172
H31.08072.61721.9135
H41.08072.61721.9135

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 117.716 Br2 C1 H4 117.716
H3 C1 H4 124.567
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability