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 CH3Br (methyl bromide)

using model chemistry: MP2=FULL/6-311G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A1
Energy calculated at MP2=FULL/6-311G*
 hartrees
Energy at 0K-2612.666878
Energy at 298.15K 
HF Energy-2611.989672
Nuclear repulsion energy89.294950
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/6-311G*
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 3128 2963 18.48      
2 A1 1401 1327 19.39      
3 A1 646 612 9.74      
4 E 3246 3074 2.98      
4 E 3246 3074 2.98      
5 E 1519 1439 7.60      
5 E 1519 1439 7.60      
6 E 1008 954 8.34      
6 E 1008 954 8.34      

Unscaled Zero Point Vibrational Energy (zpe) 8360.0 cm-1
Scaled (by 0.9471) Zero Point Vibrational Energy (zpe) 7917.7 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/6-311G*
ABC
5.24652 0.32049 0.32049

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/6-311G*

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.516
Br2 0.000 0.000 0.419
H3 0.000 1.031 -1.858
H4 0.893 -0.515 -1.858
H5 -0.893 -0.515 -1.858

Atom - Atom Distances (Å)
  C1 Br2 H3 H4 H5
C11.93571.08601.08601.0860
Br21.93572.49992.49992.4999
H31.08602.49991.78551.7855
H41.08602.49991.78551.7855
H51.08602.49991.78551.7855

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 108.339 Br2 C1 H4 108.339
Br2 C1 H5 108.339 H3 C1 H4 110.579
H3 C1 H5 110.579 H4 C1 H5 110.579
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability