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

using model chemistry: CCD/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 CCD/cc-pVDZ
 hartrees
Energy at 0K-2612.304895
Energy at 298.15K 
HF Energy-2612.000208
Nuclear repulsion energy88.774377
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 CCD/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 3111 2976 19.21      
2 A1 1352 1293 25.06      
3 A1 638 611 9.08      
4 E 3228 3089 3.67      
4 E 3228 3089 3.67      
5 E 1480 1416 4.55      
5 E 1480 1416 4.55      
6 E 976 933 4.64      
6 E 976 933 4.64      

Unscaled Zero Point Vibrational Energy (zpe) 8235.0 cm-1
Scaled (by 0.9567) Zero Point Vibrational Energy (zpe) 7878.4 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 CCD/cc-pVDZ
ABC
5.11998 0.31731 0.31731

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

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.523
Br2 0.000 0.000 0.421
H3 0.000 1.044 -1.868
H4 0.904 -0.522 -1.868
H5 -0.904 -0.522 -1.868

Atom - Atom Distances (Å)
  C1 Br2 H3 H4 H5
C11.94461.09901.09901.0990
Br21.94462.51612.51612.5161
H31.09902.51611.80751.8075
H41.09902.51611.80751.8075
H51.09902.51611.80751.8075

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 108.287 Br2 C1 H4 108.287
Br2 C1 H5 108.287 H3 C1 H4 110.629
H3 C1 H5 110.629 H4 C1 H5 110.629
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability