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

using model chemistry: CCSD/6-31G*

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/6-31G*
 hartrees
Energy at 0K-2609.770690
Energy at 298.15K-2609.776490
HF Energy-2609.500269
Nuclear repulsion energy88.397503
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/6-31G*
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 3129 2955 15.76      
2 A1 1386 1309 23.73      
3 A1 614 579 12.10      
4 E 3242 3061 3.26      
4 E 3242 3061 3.26      
5 E 1528 1443 5.19      
5 E 1528 1443 5.19      
6 E 993 938 5.16      
6 E 993 938 5.16      

Unscaled Zero Point Vibrational Energy (zpe) 8327.1 cm-1
Scaled (by 0.9443) Zero Point Vibrational Energy (zpe) 7863.3 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/6-31G*
ABC
5.17815 0.31359 0.31359

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

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 0.421
H3 0.000 1.041 -1.851
H4 0.902 -0.521 -1.851
H5 -0.902 -0.521 -1.851

Atom - Atom Distances (Å)
  C1 Br2 H3 H4 H5
C11.95041.08971.08971.0897
Br21.95042.49912.49912.4991
H31.08972.49911.80331.8033
H41.08972.49911.80331.8033
H51.08972.49911.80331.8033

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 107.161 Br2 C1 H4 107.161
Br2 C1 H5 107.161 H3 C1 H4 111.679
H3 C1 H5 111.679 H4 C1 H5 111.679
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability