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

using model chemistry: MP4/Def2TZVPP

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A1
Energy calculated at MP4/Def2TZVPP
 hartrees
Energy at 0K-2612.544042
Energy at 298.15K 
HF Energy-2612.046544
Nuclear repulsion energy89.245493
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 MP4/Def2TZVPP
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 3093 3093        
2 A1 1344 1344        
3 A1 633 633        
4 E 3204 3204        
4 E 3204 3204        
5 E 1487 1487        
5 E 1487 1487        
6 E 974 974        
6 E 974 974        

Unscaled Zero Point Vibrational Energy (zpe) 8199.2 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 8199.2 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 MP4/Def2TZVPP
ABC
5.23537 0.32007 0.32007

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP4/Def2TZVPP

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.520
Br2 0.000 0.000 0.419
H3 0.000 1.032 -1.853
H4 0.894 -0.516 -1.853
H5 -0.894 -0.516 -1.853

Atom - Atom Distances (Å)
  C1 Br2 H3 H4 H5
C11.93891.08461.08461.0846
Br21.93892.49602.49602.4960
H31.08462.49601.78741.7874
H41.08462.49601.78741.7874
H51.08462.49601.78741.7874

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 107.927 Br2 C1 H4 107.927
Br2 C1 H5 107.927 H3 C1 H4 110.971
H3 C1 H5 110.971 H4 C1 H5 110.971
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability