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

using model chemistry: mPW1PW91/daug-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 mPW1PW91/daug-cc-pVTZ
 hartrees
Energy at 0K-2614.310242
Energy at 298.15K 
HF Energy-2614.310242
Nuclear repulsion energy89.364321
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 mPW1PW91/daug-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 3101 3101 15.79 149.43 0.00 0.01
2 A1 1333 1333 15.47 1.19 0.15 0.26
3 A1 630 630 10.99 21.16 0.16 0.27
4 E 3210 3210 1.03 52.77 0.75 0.86
4 E 3210 3210 1.03 52.11 0.75 0.86
5 E 1475 1475 6.34 3.44 0.75 0.86
5 E 1475 1475 6.35 3.41 0.75 0.86
6 E 970 970 3.87 0.22 0.75 0.86
6 E 970 970 3.87 0.19 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 8187.7 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 8187.7 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 mPW1PW91/daug-cc-pVTZ
ABC
5.24349 0.32095 0.32095

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/daug-cc-pVTZ

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.518
Br2 0.000 0.000 0.419
H3 0.000 1.031 -1.850
H4 0.893 -0.516 -1.850
H5 -0.893 -0.516 -1.850

Atom - Atom Distances (Å)
  C1 Br2 H3 H4 H5
C11.93631.08361.08361.0836
Br21.93632.49252.49252.4925
H31.08362.49251.78611.7861
H41.08362.49251.78611.7861
H51.08362.49251.78611.7861

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 107.891 Br2 C1 H4 107.891
Br2 C1 H5 107.891 H3 C1 H4 111.004
H3 C1 H5 111.004 H4 C1 H5 111.005
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/daug-cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.550      
2 Br -0.399      
3 H 0.316      
4 H 0.316      
5 H 0.316      


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 -1.910 1.910
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -25.782 0.000 0.000
y 0.000 -25.782 0.000
z 0.000 0.000 -22.193
Traceless
 xyz
x -1.795 0.000 0.000
y 0.000 -1.795 0.000
z 0.000 0.000 3.589
Polar
3z2-r27.178
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 4.827 0.000 0.000
y 0.000 4.827 0.000
z 0.000 0.000 6.705


<r2> (average value of r2) Å2
<r2> 48.772
(<r2>)1/2 6.984