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All results from a given calculation for CH3Br (methyl bromide)

using model chemistry: B2PLYP=FULL/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A1
Energy calculated at B2PLYP=FULL/3-21G
 hartrees
Energy at 0K-2600.947492
Energy at 298.15K 
HF Energy-2600.902220
Nuclear repulsion energy86.878642
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 B2PLYP=FULL/3-21G
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 3138 2987 13.29      
2 A1 1403 1336 20.36      
3 A1 594 565 12.00      
4 E 3243 3088 4.35      
4 E 3243 3088 4.35      
5 E 1557 1482 10.01      
5 E 1557 1482 10.01      
6 E 984 937 8.54      
6 E 984 937 8.54      

Unscaled Zero Point Vibrational Energy (zpe) 8351.1 cm-1
Scaled (by 0.952) Zero Point Vibrational Energy (zpe) 7950.2 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 B2PLYP=FULL/3-21G
ABC
5.20690 0.30115 0.30115

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP=FULL/3-21G

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.572
Br2 0.000 0.000 0.432
H3 0.000 1.035 -1.900
H4 0.896 -0.517 -1.900
H5 -0.896 -0.517 -1.900

Atom - Atom Distances (Å)
  C1 Br2 H3 H4 H5
C12.00431.08561.08561.0856
Br22.00432.55172.55172.5517
H31.08562.55171.79231.7923
H41.08562.55171.79231.7923
H51.08562.55171.79231.7923

picture of methyl bromide state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
Br2 C1 H3 107.594 Br2 C1 H4 107.594
Br2 C1 H5 107.594 H3 C1 H4 111.282
H3 C1 H5 111.282 H4 C1 H5 111.281
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability