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: QCISD/aug-cc-pVTZ

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 QCISD/aug-cc-pVTZ
 hartrees
Energy at 0K-2611.867861
Energy at 298.15K-2611.871482
HF Energy-2611.459003
Nuclear repulsion energy80.978362
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 QCISD/aug-cc-pVTZ
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' 3198 3078 5.07      
2 A' 1404 1351 18.39      
3 A' 724 697 13.83      
4 A' 136 131 60.14      
5 A" 3347 3221 0.85      
6 A" 936 900 0.58      

Unscaled Zero Point Vibrational Energy (zpe) 4872.6 cm-1
Scaled (by 0.9624) Zero Point Vibrational Energy (zpe) 4689.4 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 QCISD/aug-cc-pVTZ
ABC
9.25343 0.38082 0.36586

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/aug-cc-pVTZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.003 1.480 0.000
Br2 -0.003 -0.367 0.000
H3 0.058 1.982 0.949
H4 0.058 1.982 -0.949

Atom - Atom Distances (Å)
  C1 Br2 H3 H4
C11.84671.07541.0754
Br21.84672.53392.5339
H31.07542.53391.8983
H41.07542.53391.8983

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 117.821 Br2 C1 H4 117.821
H3 C1 H4 123.909
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (C2V)

Jump to S1C1
Energy calculated at QCISD/aug-cc-pVTZ
 hartrees
Energy at 0K-2611.867859
Energy at 298.15K 
HF Energy-2611.458966
Nuclear repulsion energy80.994453
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 QCISD/aug-cc-pVTZ
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 3200 3080 4.91      
2 A1 1404 1351 18.59      
3 A1 725 698 13.60      
4 B1 94i 91i 61.62      
5 B2 3349 3223 0.93      
6 B2 934 899 0.60      

Unscaled Zero Point Vibrational Energy (zpe) 4758.3 cm-1
Scaled (by 0.9624) Zero Point Vibrational Energy (zpe) 4579.4 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 QCISD/aug-cc-pVTZ
ABC
9.27324 0.38097 0.36594

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/aug-cc-pVTZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.479
Br2 0.000 0.000 0.367
H3 0.000 0.950 -1.983
H4 0.000 -0.950 -1.983

Atom - Atom Distances (Å)
  C1 Br2 H3 H4
C11.84601.07531.0753
Br21.84602.53492.5349
H31.07532.53491.8994
H41.07532.53491.8994

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 117.968 Br2 C1 H4 117.968
H3 C1 H4 124.063
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability