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

using model chemistry: B3PW91/STO-3G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A1
Energy calculated at B3PW91/STO-3G
 hartrees
Energy at 0K-2585.461861
Energy at 298.15K 
HF Energy-2585.461861
Nuclear repulsion energy89.373434
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 B3PW91/STO-3G
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 3321 2939 0.45 42.57 0.01 0.01
2 A1 1522 1347 9.72 2.97 0.75 0.86
3 A1 751 665 5.69 12.01 0.34 0.51
4 E 3502 3099 0.21 28.41 0.75 0.86
4 E 3502 3099 0.21 28.41 0.75 0.86
5 E 1664 1473 6.19 16.41 0.75 0.86
5 E 1664 1473 6.19 16.41 0.75 0.86
6 E 1063 941 1.35 4.79 0.75 0.86
6 E 1063 941 1.35 4.79 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 9025.4 cm-1
Scaled (by 0.885) Zero Point Vibrational Energy (zpe) 7987.5 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 B3PW91/STO-3G
ABC
5.21726 0.32186 0.32186

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/STO-3G

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.504
Br2 0.000 0.000 0.419
H3 0.000 1.034 -1.881
H4 0.895 -0.517 -1.881
H5 -0.895 -0.517 -1.881

Atom - Atom Distances (Å)
  C1 Br2 H3 H4 H5
C11.92281.10041.10041.1004
Br21.92282.52162.52162.5216
H31.10042.52161.79051.7905
H41.10042.52161.79051.7905
H51.10042.52161.79051.7905

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 110.046 Br2 C1 H4 110.046
Br2 C1 H5 110.046 H3 C1 H4 108.891
H3 C1 H5 108.891 H4 C1 H5 108.891
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/STO-3G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.283      
2 Br -0.019      
3 H 0.101      
4 H 0.101      
5 H 0.101      


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 -1.459 1.459
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -23.259 0.000 0.000
y 0.000 -23.259 0.000
z 0.000 0.000 -21.287
Traceless
 xyz
x -0.986 0.000 0.000
y 0.000 -0.986 0.000
z 0.000 0.000 1.972
Polar
3z2-r23.945
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 0.881 0.000 0.000
y 0.000 0.881 0.000
z 0.000 0.000 2.721


<r2> (average value of r2) Å2
<r2> 47.649
(<r2>)1/2 6.903