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=FULL/aug-cc-pVQZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 2 yes C2V 2A1

Conformer 1 (CS)

Jump to S1C2
Vibrational Frequencies calculated at MP2=FULL/aug-cc-pVQZ
Rotational Constants (cm-1) from geometry optimized at MP2=FULL/aug-cc-pVQZ
See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/aug-cc-pVQZ
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (C2V)

Jump to S1C1
Energy calculated at MP2=FULL/aug-cc-pVQZ
 hartrees
Energy at 0K-2612.039769
Energy at 298.15K 
HF Energy-2611.463726
Nuclear repulsion energy81.898624
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=FULL/aug-cc-pVQZ
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 3248 3106 4.10 126.48 0.07 0.13
2 A1 1418 1357 16.69 1.20 0.30 0.46
3 A1 758 725 16.94 7.07 0.06 0.11
4 B1 164 157 64.76 0.99 0.75 0.86
5 B2 3404 3256 2.92 47.27 0.75 0.86
6 B2 944 903 0.91 0.69 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 4968.3 cm-1
Scaled (by 0.9564) Zero Point Vibrational Energy (zpe) 4751.7 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 MP2=FULL/aug-cc-pVQZ
ABC
9.40554 0.38989 0.37437

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/aug-cc-pVQZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.461
Br2 0.000 0.000 0.363
H3 0.000 0.943 -1.966
H4 0.000 -0.943 -1.966

Atom - Atom Distances (Å)
  C1 Br2 H3 H4
C11.82361.06971.0697
Br21.82362.51232.5123
H31.06972.51231.8859
H41.06972.51231.8859

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 118.171 Br2 C1 H4 118.171
H3 C1 H4 123.658
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability