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

using model chemistry: MP2/6-31G**

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 MP2/6-31G**
 hartrees
Energy at 0K-2609.101191
Energy at 298.15K-2609.105202
HF Energy-2608.870836
Nuclear repulsion energy80.412103
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 MP2/6-31G**
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' 3280 3072 7.42      
2 A' 1463 1370 27.91      
3 A' 712 667 22.49      
4 A' 453 424 52.13      
5 A" 3438 3220 0.01      
6 A" 979 917 0.94      

Unscaled Zero Point Vibrational Energy (zpe) 5162.3 cm-1
Scaled (by 0.9365) Zero Point Vibrational Energy (zpe) 4834.5 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 MP2/6-31G**
ABC
9.12469 0.37492 0.36104

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/6-31G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.009 1.495 0.000
Br2 -0.009 -0.369 0.000
H3 0.184 1.976 0.942
H4 0.184 1.976 -0.942

Atom - Atom Distances (Å)
  C1 Br2 H3 H4
C11.86431.07501.0750
Br21.86432.53452.5345
H31.07502.53451.8838
H41.07502.53451.8838

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 116.566 Br2 C1 H4 116.566
H3 C1 H4 122.373
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (C2V)

Jump to S1C1
Energy calculated at MP2/6-31G**
 hartrees
Energy at 0K-2609.100971
Energy at 298.15K 
HF Energy-2608.870581
Nuclear repulsion energy80.546928
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 MP2/6-31G**
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 3298 3088 4.72 101.37 0.12 0.21
2 A1 1462 1369 30.52 2.39 0.66 0.80
3 A1 717 671 19.61 6.65 0.22 0.36
4 B1 335i 314i 72.05 0.73 0.75 0.86
5 B2 3462 3242 0.47 52.39 0.75 0.86
6 B2 966 904 1.15 3.93 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 4784.2 cm-1
Scaled (by 0.9365) Zero Point Vibrational Energy (zpe) 4480.4 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 MP2/6-31G**
ABC
9.29115 0.37625 0.36161

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/6-31G**

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.490
Br2 0.000 0.000 0.369
H3 0.000 0.949 -1.991
H4 0.000 -0.949 -1.991

Atom - Atom Distances (Å)
  C1 Br2 H3 H4
C11.85871.07321.0732
Br21.85872.54372.5437
H31.07322.54371.8975
H41.07322.54371.8975

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 117.861 Br2 C1 H4 117.861
H3 C1 H4 124.278
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability