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

using model chemistry: B2PLYP=FULLultrafine/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 B2PLYP=FULLultrafine/6-311G*
 hartrees
Energy at 0K-2613.667594
Energy at 298.15K 
HF Energy-2613.459022
Nuclear repulsion energy88.713282
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=FULLultrafine/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 3112 3112 21.36 114.33 0.00 0.00
2 A1 1378 1378 24.84 0.37 0.75 0.86
3 A1 612 612 12.52 21.14 0.28 0.44
4 E 3221 3221 4.87 60.87 0.75 0.86
4 E 3221 3221 4.87 60.87 0.75 0.86
5 E 1511 1511 7.19 11.01 0.75 0.86
5 E 1511 1511 7.19 11.01 0.75 0.86
6 E 990 990 7.87 5.15 0.75 0.86
6 E 990 990 7.87 5.15 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 8271.7 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 8271.7 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 B2PLYP=FULLultrafine/6-311G*
ABC
5.24318 0.31571 0.31571

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP=FULLultrafine/6-311G*

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.530
Br2 0.000 0.000 0.422
H3 0.000 1.031 -1.867
H4 0.893 -0.516 -1.867
H5 -0.893 -0.516 -1.867

Atom - Atom Distances (Å)
  C1 Br2 H3 H4 H5
C11.95271.08471.08471.0847
Br21.95272.51052.51052.5105
H31.08472.51051.78611.7861
H41.08472.51051.78611.7861
H51.08472.51051.78611.7861

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 108.063 Br2 C1 H4 108.063
Br2 C1 H5 108.063 H3 C1 H4 110.842
H3 C1 H5 110.842 H4 C1 H5 110.842
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability