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

using model chemistry: PBEPBEultrafine/aug-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 PBEPBEultrafine/aug-cc-pVTZ
 hartrees
Energy at 0K-2613.681142
Energy at 298.15K 
HF Energy-2613.681142
Nuclear repulsion energy88.565537
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/aug-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 3013 2980 15.16 160.95 0.00 0.01
2 A1 1276 1262 14.35 0.61 0.04 0.07
3 A1 598 591 9.39 19.41 0.15 0.26
4 E 3118 3083 1.21 54.87 0.75 0.86
4 E 3118 3083 1.21 54.80 0.75 0.86
5 E 1422 1406 5.77 3.39 0.75 0.86
5 E 1422 1406 5.77 3.41 0.75 0.86
6 E 932 921 3.93 0.28 0.75 0.86
6 E 932 921 3.93 0.28 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 7915.1 cm-1
Scaled (by 0.9888) Zero Point Vibrational Energy (zpe) 7826.4 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 PBEPBEultrafine/aug-cc-pVTZ
ABC
5.15349 0.31518 0.31518

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

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.532
Br2 0.000 0.000 0.423
H3 0.000 1.040 -1.866
H4 0.901 -0.520 -1.866
H5 -0.901 -0.520 -1.866

Atom - Atom Distances (Å)
  C1 Br2 H3 H4 H5
C11.95451.09241.09241.0924
Br21.95452.51352.51352.5135
H31.09242.51351.80161.8016
H41.09242.51351.80161.8016
H51.09242.51351.80161.8016

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 107.785 Br2 C1 H4 107.785
Br2 C1 H5 107.785 H3 C1 H4 111.103
H3 C1 H5 111.103 H4 C1 H5 111.103
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBEultrafine/aug-cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.578      
2 Br -0.047      
3 H 0.208      
4 H 0.208      
5 H 0.208      


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 -1.852 1.852
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -26.047 0.000 0.000
y 0.000 -26.047 0.000
z 0.000 0.000 -22.416
Traceless
 xyz
x -1.816 0.000 0.000
y 0.000 -1.816 0.000
z 0.000 0.000 3.632
Polar
3z2-r27.264
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 5.021 0.000 0.000
y 0.000 5.021 0.000
z 0.000 0.000 6.959


<r2> (average value of r2) Å2
<r2> 49.529
(<r2>)1/2 7.038