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

using model chemistry: B3LYPultrafine/aug-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 B3LYPultrafine/aug-cc-pVDZ
 hartrees
Energy at 0K-2614.073980
Energy at 298.15K 
HF Energy-2614.073980
Nuclear repulsion energy88.154423
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 B3LYPultrafine/aug-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 3080 2988 16.39 150.45 0.00 0.00
2 A1 1295 1257 19.83 0.78 0.13 0.23
3 A1 591 574 13.48 23.47 0.18 0.31
4 E 3196 3102 1.64 55.09 0.75 0.86
4 E 3196 3102 1.64 55.09 0.75 0.86
5 E 1435 1393 5.58 3.48 0.75 0.86
5 E 1435 1393 5.58 3.48 0.75 0.86
6 E 947 919 3.94 0.34 0.75 0.86
6 E 947 919 3.94 0.34 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 8061.7 cm-1
Scaled (by 0.9704) Zero Point Vibrational Energy (zpe) 7823.0 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 B3LYPultrafine/aug-cc-pVDZ
ABC
5.14012 0.31192 0.31192

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYPultrafine/aug-cc-pVDZ

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.541
Br2 0.000 0.000 0.425
H3 0.000 1.041 -1.872
H4 0.902 -0.521 -1.872
H5 -0.902 -0.521 -1.872

Atom - Atom Distances (Å)
  C1 Br2 H3 H4 H5
C11.96611.09261.09261.0926
Br21.96612.52152.52152.5215
H31.09262.52151.80391.8039
H41.09262.52151.80391.8039
H51.09262.52151.80391.8039

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 107.595 Br2 C1 H4 107.595
Br2 C1 H5 107.595 H3 C1 H4 111.280
H3 C1 H5 111.280 H4 C1 H5 111.280
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYPultrafine/aug-cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.499      
2 Br 0.135      
3 H -0.211      
4 H -0.211      
5 H -0.211      


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 -1.975 1.975
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -26.124 0.000 0.000
y 0.000 -26.124 0.000
z 0.000 0.000 -22.332
Traceless
 xyz
x -1.896 0.000 0.000
y 0.000 -1.896 0.000
z 0.000 0.000 3.792
Polar
3z2-r27.584
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 4.642 0.000 0.000
y 0.000 4.642 0.000
z 0.000 0.000 6.790


<r2> (average value of r2) Å2
<r2> 49.860
(<r2>)1/2 7.061