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

using model chemistry: QCISD/cc-pVTZ-PP

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/cc-pVTZ-PP
 hartrees
Energy at 0K-455.569999
Energy at 298.15K 
HF Energy-455.137309
Nuclear repulsion energy66.644300
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/cc-pVTZ-PP
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A1 3103 3103 18.07      
2 A1 1355 1355 22.62      
3 A1 635 635 10.00      
4 E 3210 3210 2.78      
4 E 3210 3210 2.78      
5 E 1496 1496 4.60      
5 E 1496 1496 4.60      
6 E 977 977 3.90      
6 E 977 977 3.90      

Unscaled Zero Point Vibrational Energy (zpe) 8230.0 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 8230.0 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/cc-pVTZ-PP
ABC
5.25219 0.32147 0.32147

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

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.515
Br2 0.000 0.000 0.418
H3 0.000 1.030 -1.851
H4 0.892 -0.515 -1.851
H5 -0.892 -0.515 -1.851

Atom - Atom Distances (Å)
  C1 Br2 H3 H4 H5
C11.93391.08371.08371.0837
Br21.93392.49282.49282.4928
H31.08372.49281.78461.7846
H41.08372.49281.78461.7846
H51.08372.49281.78461.7846

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 108.062 Br2 C1 H4 108.062
Br2 C1 H5 108.062 H3 C1 H4 110.843
H3 C1 H5 110.843 H4 C1 H5 110.843
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability