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)/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(T)/6-31G**
 hartrees
Energy at 0K-2609.802028
Energy at 298.15K 
HF Energy-2609.505678
Nuclear repulsion energy88.440021
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**
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 3146 2984        
2 A1 1379 1308        
3 A1 607 576        
4 E 3267 3099        
4 E 3267 3099        
5 E 1529 1450        
5 E 1529 1450        
6 E 988 937        
6 E 988 937        

Unscaled Zero Point Vibrational Energy (zpe) 8349.6 cm-1
Scaled (by 0.9485) Zero Point Vibrational Energy (zpe) 7919.6 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**
ABC
5.21866 0.31359 0.31359

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

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.538
Br2 0.000 0.000 0.424
H3 0.000 1.034 -1.867
H4 0.895 -0.517 -1.867
H5 -0.895 -0.517 -1.867

Atom - Atom Distances (Å)
  C1 Br2 H3 H4 H5
C11.96111.08491.08491.0849
Br21.96112.51312.51312.5131
H31.08492.51311.79031.7903
H41.08492.51311.79031.7903
H51.08492.51311.79031.7903

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 107.687 Br2 C1 H4 107.687
Br2 C1 H5 107.687 H3 C1 H4 111.195
H3 C1 H5 111.195 H4 C1 H5 111.195
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability