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: 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-2608.829335
Energy at 298.15K-2608.832966
HF Energy-2608.720855
Nuclear repulsion energy78.487222
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' 3252 3111 5.29      
2 A' 1460 1397 32.38      
3 A' 652 624 19.39      
4 A' 163 156 105.07      
5 A" 3419 3271 0.33      
6 A" 957 916 1.65      

Unscaled Zero Point Vibrational Energy (zpe) 4951.3 cm-1
Scaled (by 0.9568) Zero Point Vibrational Energy (zpe) 4737.4 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
9.12643 0.35588 0.34263

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 -0.003 1.535 0.000
Br2 -0.003 -0.379 0.000
H3 0.066 2.033 0.955
H4 0.066 2.033 -0.955

Atom - Atom Distances (Å)
  C1 Br2 H3 H4
C11.91401.07981.0798
Br21.91402.59572.5957
H31.07982.59571.9106
H41.07982.59571.9106

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 117.496 Br2 C1 H4 117.496
H3 C1 H4 124.429
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (C2V)

Jump to S1C1
Energy calculated at MP2/6-31G
 hartrees
Energy at 0K-2608.829332
Energy at 298.15K 
HF Energy-2608.720852
Nuclear repulsion energy78.511090
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 3254 3114 5.00 108.09 0.12 0.21
2 A1 1459 1396 32.89 1.33 0.73 0.84
3 A1 653 625 18.88 10.25 0.36 0.52
4 B1 114i 109i 110.47 0.76 0.75 0.86
5 B2 3422 3275 0.24 54.00 0.75 0.86
6 B2 955 914 1.70 8.93 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 4815.1 cm-1
Scaled (by 0.9568) Zero Point Vibrational Energy (zpe) 4607.1 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
9.14573 0.35611 0.34277

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 -1.534
Br2 0.000 0.000 0.379
H3 0.000 0.956 -2.035
H4 0.000 -0.956 -2.035

Atom - Atom Distances (Å)
  C1 Br2 H3 H4
C11.91311.07951.0795
Br21.91312.59662.5966
H31.07952.59661.9125
H41.07952.59661.9125

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 117.647 Br2 C1 H4 117.647
H3 C1 H4 124.707
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability