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

using model chemistry: QCISD(T)/Def2TZVPP

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)/Def2TZVPP
 hartrees
Energy at 0K-2612.542845
Energy at 298.15K 
HF Energy-2612.046550
Nuclear repulsion energy89.192276
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)/Def2TZVPP
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 3093 3093        
2 A1 1344 1344        
3 A1 629 629        
4 E 3201 3201        
4 E 3201 3201        
5 E 1487 1487        
5 E 1487 1487        
6 E 974 974        
6 E 973 973        

Unscaled Zero Point Vibrational Energy (zpe) 8194.5 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 8194.5 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)/Def2TZVPP
ABC
5.23370 0.31963 0.31963

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD(T)/Def2TZVPP

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 0.420
H3 0.000 1.032 -1.854
H4 0.894 -0.516 -1.854
H5 -0.894 -0.516 -1.854

Atom - Atom Distances (Å)
  C1 Br2 H3 H4 H5
C11.94051.08451.08451.0845
Br21.94052.49672.49672.4967
H31.08452.49671.78771.7877
H41.08452.49671.78771.7877
H51.08452.49671.78771.7877

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 107.877 Br2 C1 H4 107.877
Br2 C1 H5 107.877 H3 C1 H4 111.017
H3 C1 H5 111.017 H4 C1 H5 111.017
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability