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

using model chemistry: B2PLYP=FULLultrafine/6-31+G**

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/6-31+G**
 hartrees
Energy at 0K-2611.108541
Energy at 298.15K 
HF Energy-2611.011364
Nuclear repulsion energy88.663198
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/6-31+G**
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 3130 3130 18.16 113.41 0.00 0.00
2 A1 1373 1373 29.60 0.85 0.13 0.23
3 A1 609 609 13.16 24.77 0.23 0.37
4 E 3246 3246 1.90 59.47 0.75 0.86
4 E 3246 3246 1.90 59.47 0.75 0.86
5 E 1505 1505 5.86 8.72 0.75 0.86
5 E 1505 1505 5.86 8.72 0.75 0.86
6 E 992 992 5.13 3.40 0.75 0.86
6 E 992 992 5.13 3.40 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 8299.2 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 8299.2 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=FULLultrafine/6-31+G**
ABC
5.22641 0.31537 0.31537

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP=FULLultrafine/6-31+G**

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.532
Br2 0.000 0.000 0.422
H3 0.000 1.033 -1.865
H4 0.894 -0.516 -1.865
H5 -0.894 -0.516 -1.865

Atom - Atom Distances (Å)
  C1 Br2 H3 H4 H5
C11.95461.08501.08501.0850
Br21.95462.50942.50942.5094
H31.08502.50941.78901.7890
H41.08502.50941.78901.7890
H51.08502.50941.78901.7890

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 107.839 Br2 C1 H4 107.839
Br2 C1 H5 107.839 H3 C1 H4 111.053
H3 C1 H5 111.053 H4 C1 H5 111.053
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability