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

using model chemistry: CCSD/cc-pVTZ-PP

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A1
Energy calculated at CCSD/cc-pVTZ-PP
 hartrees
Energy at 0K-455.569337
Energy at 298.15K 
HF Energy-455.137313
Nuclear repulsion energy66.669095
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 CCSD/cc-pVTZ-PP
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 3106 2964 17.81      
2 A1 1357 1294 22.15      
3 A1 638 608 9.72      
4 E 3213 3065 2.65      
4 E 3213 3065 2.65      
5 E 1497 1428 4.66      
5 E 1497 1428 4.66      
6 E 978 933 3.94      
6 E 978 933 3.94      

Unscaled Zero Point Vibrational Energy (zpe) 8238.4 cm-1
Scaled (by 0.954) Zero Point Vibrational Energy (zpe) 7859.4 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 CCSD/cc-pVTZ-PP
ABC
5.25535 0.32173 0.32173

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD/cc-pVTZ-PP

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.515
Br2 0.000 0.000 0.418
H3 0.000 1.030 -1.851
H4 0.892 -0.515 -1.851
H5 -0.892 -0.515 -1.851

Atom - Atom Distances (Å)
  C1 Br2 H3 H4 H5
C11.93311.08351.08351.0835
Br21.93312.49212.49212.4921
H31.08352.49211.78401.7840
H41.08352.49211.78401.7840
H51.08352.49211.78401.7840

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 108.078 Br2 C1 H4 108.078
Br2 C1 H5 108.078 H3 C1 H4 110.828
H3 C1 H5 110.828 H4 C1 H5 110.828
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability