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

using model chemistry: QCISD(T)=FULL/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 QCISD(T)=FULL/6-31G*
 hartrees
Energy at 0K-2609.807883
Energy at 298.15K 
HF Energy-2609.500194
Nuclear repulsion energy88.363198
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)=FULL/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 3110 3110        
2 A1 1377 1377        
3 A1 607 607        
4 E 3223 3223        
4 E 3223 3223        
5 E 1521 1521        
5 E 1520 1520        
6 E 986 986        
6 E 986 986        

Unscaled Zero Point Vibrational Energy (zpe) 8276.2 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 8276.2 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)=FULL/6-31G*
ABC
5.16850 0.31341 0.31341

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

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.537
Br2 0.000 0.000 0.424
H3 0.000 1.039 -1.869
H4 0.899 -0.519 -1.869
H5 -0.899 -0.519 -1.869

Atom - Atom Distances (Å)
  C1 Br2 H3 H4 H5
C11.96081.09051.09051.0905
Br21.96082.51732.51732.5173
H31.09052.51731.79901.7990
H41.09052.51731.79901.7990
H51.09052.51731.79901.7990

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 107.741 Br2 C1 H4 107.741
Br2 C1 H5 107.741 H3 C1 H4 111.144
H3 C1 H5 111.144 H4 C1 H5 111.145
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability