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: CISD/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 CISD/6-31G*
 hartrees
Energy at 0K-2609.093477
Energy at 298.15K-2609.097405
HF Energy-2608.866723
Nuclear repulsion energy80.083132
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 CISD/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' 3259 3017 6.42      
2 A' 1451 1344 26.32      
3 A' 701 649 19.64      
4 A' 377 349 60.90      
5 A" 3408 3155 0.01      
6 A" 967 895 1.05      

Unscaled Zero Point Vibrational Energy (zpe) 5081.4 cm-1
Scaled (by 0.9258) Zero Point Vibrational Energy (zpe) 4704.3 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 CISD/6-31G*
ABC
9.10753 0.37181 0.35787

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.008 1.501 0.000
Br2 -0.008 -0.371 0.000
H3 0.156 1.989 0.947
H4 0.156 1.989 -0.947

Atom - Atom Distances (Å)
  C1 Br2 H3 H4
C11.87141.07851.0785
Br21.87142.54862.5486
H31.07852.54861.8944
H41.07852.54861.8944

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 116.962 Br2 C1 H4 116.962
H3 C1 H4 122.871
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (C2V)

Jump to S1C1
Energy calculated at CISD/6-31G*
 hartrees
Energy at 0K-2609.093372
Energy at 298.15K 
HF Energy-2608.866450
Nuclear repulsion energy80.161170
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 CISD/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 3269 3026 4.58      
2 A1 1449 1341 28.10      
3 A1 704 651 17.67      
4 B1 273i 252i 76.36      
5 B2 3423 3169 0.09      
6 B2 957 886 1.21      

Unscaled Zero Point Vibrational Energy (zpe) 4764.0 cm-1
Scaled (by 0.9258) Zero Point Vibrational Energy (zpe) 4410.5 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 CISD/6-31G*
ABC
9.22014 0.37259 0.35812

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.497
Br2 0.000 0.000 0.371
H3 0.000 0.952 -2.001
H4 0.000 -0.952 -2.001

Atom - Atom Distances (Å)
  C1 Br2 H3 H4
C11.86791.07741.0774
Br21.86792.55562.5556
H31.07742.55561.9048
H41.07742.55561.9048

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 117.870 Br2 C1 H4 117.870
H3 C1 H4 124.260
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability