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

using model chemistry: CCSD(T)/6-31G(2df,p)

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(T)/6-31G(2df,p)
 hartrees
Energy at 0K-2610.052807
Energy at 298.15K 
HF Energy-2609.686149
Nuclear repulsion energy89.578698
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(T)/6-31G(2df,p)
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 3115 3115        
2 A1 1363 1363        
3 A1 645 645        
4 E 3223 3223        
4 E 3223 3223        
5 E 1501 1501        
5 E 1501 1501        
6 E 983 983        
6 E 983 983        

Unscaled Zero Point Vibrational Energy (zpe) 8267.8 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 8267.8 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(T)/6-31G(2df,p)
ABC
5.24022 0.32294 0.32294

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD(T)/6-31G(2df,p)

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.509
Br2 0.000 0.000 0.418
H3 0.000 1.032 -1.855
H4 0.893 -0.516 -1.855
H5 -0.893 -0.516 -1.855

Atom - Atom Distances (Å)
  C1 Br2 H3 H4 H5
C11.92671.08811.08811.0881
Br21.92672.49622.49622.4962
H31.08812.49621.78661.7866
H41.08812.49621.78661.7866
H51.08812.49621.78661.7866

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 108.564 Br2 C1 H4 108.564
Br2 C1 H5 108.564 H3 C1 H4 110.363
H3 C1 H5 110.363 H4 C1 H5 110.363
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability