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/6-311+G(3df,2p)

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 CISD/6-311+G(3df,2p)
Rotational Constants (cm-1) from geometry optimized at CISD/6-311+G(3df,2p)
See section I.F.4 to change rotational constant units
Geometric Data calculated at CISD/6-311+G(3df,2p)
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (C2V)

Jump to S1C1
Energy calculated at CISD/6-311+G(3df,2p)
 hartrees
Energy at 0K-2611.679170
Energy at 298.15K 
HF Energy-2611.369692
Nuclear repulsion energy81.022357
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/6-311+G(3df,2p)
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 3252 2998 4.33      
2 A1 1444 1331 20.24      
3 A1 736 678 15.15      
4 B1 99i 91i 62.10      
5 B2 3405 3139 1.50      
6 B2 961 885 0.69      

Unscaled Zero Point Vibrational Energy (zpe) 4849.0 cm-1
Scaled (by 0.9218) Zero Point Vibrational Energy (zpe) 4469.8 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/6-311+G(3df,2p)
ABC
9.35878 0.38094 0.36604

See section I.F.4 to change rotational constant units
Geometric Data calculated at CISD/6-311+G(3df,2p)

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 0.945 -1.984
H4 0.000 -0.945 -1.984

Atom - Atom Distances (Å)
  C1 Br2 H3 H4
C11.84611.07151.0715
Br21.84612.53352.5335
H31.07152.53351.8907
H41.07152.53351.8907

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 118.085 Br2 C1 H4 118.085
H3 C1 H4 123.831
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability