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

using model chemistry: QCISD(T)/aug-cc-pVTZ

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(T)/aug-cc-pVTZ
 hartrees
Energy at 0K-2612.554863
Energy at 298.15K 
HF Energy-2612.092914
Nuclear repulsion energy89.203941
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(T)/aug-cc-pVTZ
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 3084 2982        
2 A1 1347 1302        
3 A1 626 605        
4 E 3192 3086        
4 E 3192 3086        
5 E 1491 1441        
5 E 1490 1441        
6 E 975 943        
6 E 975 943        

Unscaled Zero Point Vibrational Energy (zpe) 8185.7 cm-1
Scaled (by 0.9668) Zero Point Vibrational Energy (zpe) 7914.0 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 QCISD(T)/aug-cc-pVTZ
ABC
5.21651 0.31983 0.31983

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

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.521
Br2 0.000 0.000 0.419
H3 0.000 1.034 -1.852
H4 0.895 -0.517 -1.852
H5 -0.895 -0.517 -1.852

Atom - Atom Distances (Å)
  C1 Br2 H3 H4 H5
C11.94011.08561.08561.0856
Br21.94012.49562.49562.4956
H31.08562.49561.79071.7907
H41.08562.49561.79071.7907
H51.08562.49561.79071.7907

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 107.764 Br2 C1 H4 107.764
Br2 C1 H5 107.764 H3 C1 H4 111.123
H3 C1 H5 111.123 H4 C1 H5 111.123
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability