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: QCISD/aug-cc-pVDZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A1
Energy calculated at QCISD/aug-cc-pVDZ
 hartrees
Energy at 0K-2612.330203
Energy at 298.15K 
HF Energy-2612.005123
Nuclear repulsion energy88.452340
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 QCISD/aug-cc-pVDZ
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 3088 2991 19.54      
2 A1 1331 1289 23.49      
3 A1 617 598 11.44      
4 E 3202 3101 2.96      
4 E 3202 3101 2.96      
5 E 1464 1418 4.04      
5 E 1464 1418 4.04      
6 E 969 939 3.12      
6 E 969 939 3.12      

Unscaled Zero Point Vibrational Energy (zpe) 8152.2 cm-1
Scaled (by 0.9687) Zero Point Vibrational Energy (zpe) 7897.1 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 QCISD/aug-cc-pVDZ
ABC
5.10905 0.31466 0.31466

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/aug-cc-pVDZ

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.532
Br2 0.000 0.000 0.423
H3 0.000 1.045 -1.869
H4 0.905 -0.522 -1.869
H5 -0.905 -0.522 -1.869

Atom - Atom Distances (Å)
  C1 Br2 H3 H4 H5
C11.95531.09741.09741.0974
Br21.95532.51842.51842.5184
H31.09742.51841.80941.8094
H41.09742.51841.80941.8094
H51.09742.51841.80941.8094

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 107.840 Br2 C1 H4 107.840
Br2 C1 H5 107.840 H3 C1 H4 111.052
H3 C1 H5 111.052 H4 C1 H5 111.052
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability