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

using model chemistry: B2PLYP=FULLultrafine/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 B2PLYP=FULLultrafine/cc-pVDZ
 hartrees
Energy at 0K-2613.559550
Energy at 298.15K 
HF Energy-2613.464286
Nuclear repulsion energy88.621731
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 B2PLYP=FULLultrafine/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 3105 2976 17.87 128.78 0.00 0.01
2 A1 1327 1272 26.14 0.22 0.39 0.57
3 A1 616 590 12.43 18.94 0.28 0.44
4 E 3227 3092 2.16 64.51 0.75 0.86
4 E 3227 3092 2.16 64.50 0.75 0.86
5 E 1466 1405 5.67 11.62 0.75 0.86
5 E 1466 1405 5.67 11.62 0.75 0.86
6 E 964 924 5.44 4.62 0.75 0.86
6 E 964 924 5.44 4.62 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 8181.3 cm-1
Scaled (by 0.9582) Zero Point Vibrational Energy (zpe) 7839.3 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 B2PLYP=FULLultrafine/cc-pVDZ
ABC
5.14056 0.31580 0.31580

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP=FULLultrafine/cc-pVDZ

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.529
Br2 0.000 0.000 0.422
H3 0.000 1.041 -1.867
H4 0.902 -0.521 -1.867
H5 -0.902 -0.521 -1.867

Atom - Atom Distances (Å)
  C1 Br2 H3 H4 H5
C11.95141.09481.09481.0948
Br21.95142.51482.51482.5148
H31.09482.51481.80391.8039
H41.09482.51481.80391.8039
H51.09482.51481.80391.8039

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 107.962 Br2 C1 H4 107.962
Br2 C1 H5 107.962 H3 C1 H4 110.937
H3 C1 H5 110.937 H4 C1 H5 110.937
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B2PLYP=FULLultrafine/cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.124      
2 Br -0.127      
3 H 0.084      
4 H 0.084      
5 H 0.084      


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 -1.838 1.838
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -25.676 0.000 0.000
y 0.000 -25.676 0.000
z 0.000 0.000 -22.083
Traceless
 xyz
x -1.796 0.000 0.000
y 0.000 -1.796 0.000
z 0.000 0.000 3.593
Polar
3z2-r27.186
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 2.916 0.000 0.000
y 0.000 2.916 0.000
z 0.000 0.000 5.413


<r2> (average value of r2) Å2
<r2> 49.261
(<r2>)1/2 7.019