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

using model chemistry: B2PLYP=FULLultrafine/6-31G*

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/6-31G*
 hartrees
Energy at 0K-2611.082400
Energy at 298.15K 
HF Energy-2610.991807
Nuclear repulsion energy88.570215
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/6-31G*
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 3139 2978 15.95 101.51 0.00 0.01
2 A1 1380 1309 27.65 1.02 0.66 0.79
3 A1 610 579 13.72 18.77 0.27 0.42
4 E 3252 3086 2.91 58.17 0.75 0.86
4 E 3252 3086 2.91 58.17 0.75 0.86
5 E 1529 1450 5.21 13.87 0.75 0.86
5 E 1529 1450 5.21 13.87 0.75 0.86
6 E 988 937 5.66 6.30 0.75 0.86
6 E 988 937 5.66 6.30 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 8332.8 cm-1
Scaled (by 0.9487) Zero Point Vibrational Energy (zpe) 7905.3 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/6-31G*
ABC
5.21018 0.31474 0.31474

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP=FULLultrafine/6-31G*

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.534
Br2 0.000 0.000 0.423
H3 0.000 1.034 -1.866
H4 0.896 -0.517 -1.866
H5 -0.896 -0.517 -1.866

Atom - Atom Distances (Å)
  C1 Br2 H3 H4 H5
C11.95681.08631.08631.0863
Br21.95682.51142.51142.5114
H31.08632.51141.79181.7918
H41.08632.51141.79181.7918
H51.08632.51141.79181.7918

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 107.777 Br2 C1 H4 107.777
Br2 C1 H5 107.777 H3 C1 H4 111.111
H3 C1 H5 111.111 H4 C1 H5 111.111
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B2PLYP=FULLultrafine/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.467      
2 Br -0.144      
3 H 0.204      
4 H 0.204      
5 H 0.204      


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 -1.976 1.976
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -25.652 0.000 0.000
y 0.000 -25.652 0.000
z 0.000 0.000 -21.755
Traceless
 xyz
x -1.949 0.000 0.000
y 0.000 -1.949 0.000
z 0.000 0.000 3.897
Polar
3z2-r27.794
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 3.218 0.000 0.000
y 0.000 3.218 0.000
z 0.000 0.000 5.275


<r2> (average value of r2) Å2
<r2> 49.232
(<r2>)1/2 7.017