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

using model chemistry: PBEPBEultrafine/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 PBEPBEultrafine/cc-pVDZ
 hartrees
Energy at 0K-2613.588586
Energy at 298.15K 
HF Energy-2613.588586
Nuclear repulsion energy88.324444
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 PBEPBEultrafine/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 3010 2992 15.01 136.96 0.00 0.00
2 A1 1259 1252 20.57 1.32 0.39 0.56
3 A1 599 596 10.40 14.67 0.27 0.42
4 E 3132 3114 1.53 64.23 0.75 0.86
4 E 3132 3114 1.53 64.24 0.75 0.86
5 E 1395 1387 6.26 12.10 0.75 0.86
5 E 1395 1387 6.26 12.10 0.75 0.86
6 E 920 915 6.29 5.01 0.75 0.86
6 E 920 915 6.29 5.01 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 7880.9 cm-1
Scaled (by 0.9942) Zero Point Vibrational Energy (zpe) 7835.1 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 PBEPBEultrafine/cc-pVDZ
ABC
5.05960 0.31409 0.31409

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

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.533
Br2 0.000 0.000 0.423
H3 0.000 1.050 -1.873
H4 0.909 -0.525 -1.873
H5 -0.909 -0.525 -1.873

Atom - Atom Distances (Å)
  C1 Br2 H3 H4 H5
C11.95591.10371.10371.1037
Br21.95592.52512.52512.5251
H31.10372.52511.81821.8182
H41.10372.52511.81821.8182
H51.10372.52511.81821.8182

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 107.981 Br2 C1 H4 107.981
Br2 C1 H5 107.981 H3 C1 H4 110.919
H3 C1 H5 110.919 H4 C1 H5 110.919
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBEultrafine/cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.159      
2 Br -0.117      
3 H 0.092      
4 H 0.092      
5 H 0.092      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.000 0.000 -1.762 1.762
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -25.535 0.000 0.000
y 0.000 -25.535 0.000
z 0.000 0.000 -21.901
Traceless
 xyz
x -1.817 0.000 0.000
y 0.000 -1.817 0.000
z 0.000 0.000 3.634
Polar
3z2-r27.269
x2-y20.000
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.999 0.000 0.000
y 0.000 2.999 0.000
z 0.000 0.000 5.477


<r2> (average value of r2) Å2
<r2> 49.390
(<r2>)1/2 7.028