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

using model chemistry: QCISD(T)=FULL/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)=FULL/cc-pVTZ
 hartrees
Energy at 0K-2612.600189
Energy at 298.15K 
HF Energy-2612.092356
Nuclear repulsion energy89.386149
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/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 3107 2973        
2 A1 1347 1289        
3 A1 629 602        
4 E 3195 3057        
4 E 3195 3057        
5 E 1494 1430        
5 E 1494 1429        
6 E 967 926        
6 E 967 926        

Unscaled Zero Point Vibrational Energy (zpe) 8197.3 cm-1
Scaled (by 0.9569) Zero Point Vibrational Energy (zpe) 7844.0 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)=FULL/cc-pVTZ
ABC
5.27319 0.32094 0.32094

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

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.517
Br2 0.000 0.000 0.419
H3 0.000 1.028 -1.852
H4 0.891 -0.514 -1.852
H5 -0.891 -0.514 -1.852

Atom - Atom Distances (Å)
  C1 Br2 H3 H4 H5
C11.93601.08151.08151.0815
Br21.93602.49302.49302.4930
H31.08152.49301.78101.7810
H41.08152.49301.78101.7810
H51.08152.49301.78101.7810

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 108.051 Br2 C1 H4 108.051
Br2 C1 H5 108.051 H3 C1 H4 110.853
H3 C1 H5 110.853 H4 C1 H5 110.853
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability