return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

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

using model chemistry: CCSD(T)=FULL/cc-pVQZ

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)=FULL/cc-pVQZ
 hartrees
Energy at 0K-2612.733105
Energy at 298.15K 
HF Energy-2612.098015
Nuclear repulsion energy89.631565
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)=FULL/cc-pVQZ
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 3103 2996        
2 A1 1348 1302        
3 A1 641 619        
4 E 3212 3102        
4 E 3212 3102        
5 E 1489 1438        
5 E 1489 1438        
6 E 979 945        
6 E 979 945        

Unscaled Zero Point Vibrational Energy (zpe) 8225.9 cm-1
Scaled (by 0.9656) Zero Point Vibrational Energy (zpe) 7943.0 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)=FULL/cc-pVQZ
ABC
5.27054 0.32295 0.32295

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD(T)=FULL/cc-pVQZ

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.512
Br2 0.000 0.000 0.417
H3 0.000 1.029 -1.846
H4 0.891 -0.514 -1.846
H5 -0.891 -0.514 -1.846

Atom - Atom Distances (Å)
  C1 Br2 H3 H4 H5
C11.92971.08141.08141.0814
Br21.92972.48652.48652.4865
H31.08142.48651.78151.7815
H41.08142.48651.78151.7815
H51.08142.48651.78151.7815

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 107.991 Br2 C1 H4 107.991
Br2 C1 H5 107.991 H3 C1 H4 110.910
H3 C1 H5 110.910 H4 C1 H5 110.910
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability