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

using model chemistry: B2PLYP/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/6-31G*
 hartrees
Energy at 0K-2611.072651
Energy at 298.15K-2611.078444
HF Energy-2610.991779
Nuclear repulsion energy88.489990
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/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 3140 2980 15.80      
2 A1 1377 1307 27.75      
3 A1 605 575 13.92      
4 E 3254 3089 2.87      
4 E 3254 3089 2.87      
5 E 1528 1450 5.18      
5 E 1528 1450 5.18      
6 E 987 937 5.60      
6 E 987 937 5.60      

Unscaled Zero Point Vibrational Energy (zpe) 8329.9 cm-1
Scaled (by 0.9492) Zero Point Vibrational Energy (zpe) 7906.7 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/6-31G*
ABC
5.20553 0.31410 0.31410

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

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 0.421
H3 0.000 1.038 -1.849
H4 0.899 -0.519 -1.849
H5 -0.899 -0.519 -1.849

Atom - Atom Distances (Å)
  C1 Br2 H3 H4 H5
C11.94961.08661.08661.0866
Br21.94962.49622.49622.4962
H31.08662.49621.79841.7984
H41.08662.49621.79841.7984
H51.08662.49621.79841.7984

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 107.151 Br2 C1 H4 107.151
Br2 C1 H5 107.151 H3 C1 H4 111.688
H3 C1 H5 111.688 H4 C1 H5 111.688
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B2PLYP/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 -1.981 1.981
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -25.645 0.000 0.000
y 0.000 -25.645 0.000
z 0.000 0.000 -21.720
Traceless
 xyz
x -1.963 0.000 0.000
y 0.000 -1.963 0.000
z 0.000 0.000 3.926
Polar
3z2-r27.851
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 5.281


<r2> (average value of r2) Å2
<r2> 49.285
(<r2>)1/2 7.020