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

using model chemistry: PBEPBE/daug-cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A1
Energy calculated at PBEPBE/daug-cc-pVTZ
 hartrees
Energy at 0K-2613.681339
Energy at 298.15K 
HF Energy-2613.681339
Nuclear repulsion energy88.562319
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 PBEPBE/daug-cc-pVTZ
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 3014 3014 15.15 163.36 0.00 0.01
2 A1 1276 1276 14.35 0.85 0.05 0.10
3 A1 598 598 9.41 19.76 0.14 0.25
4 E 3118 3118 1.23 54.87 0.75 0.86
4 E 3118 3118 1.23 54.84 0.75 0.86
5 E 1422 1422 5.78 3.61 0.75 0.86
5 E 1422 1422 5.78 3.70 0.75 0.86
6 E 931 931 3.93 0.30 0.75 0.86
6 E 931 931 3.93 0.31 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 7914.8 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 7914.8 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 PBEPBE/daug-cc-pVTZ
ABC
5.15411 0.31515 0.31515

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBE/daug-cc-pVTZ

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.532
Br2 0.000 0.000 0.423
H3 0.000 1.040 -1.866
H4 0.901 -0.520 -1.866
H5 -0.901 -0.520 -1.866

Atom - Atom Distances (Å)
  C1 Br2 H3 H4 H5
C11.95461.09231.09231.0923
Br21.95462.51352.51352.5135
H31.09232.51351.80151.8015
H41.09232.51351.80151.8015
H51.09232.51351.80151.8015

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 107.787 Br2 C1 H4 107.787
Br2 C1 H5 107.787 H3 C1 H4 111.102
H3 C1 H5 111.102 H4 C1 H5 111.102
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/daug-cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.381      
2 Br -0.366      
3 H 0.249      
4 H 0.249      
5 H 0.249      


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 -1.851 1.851
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -26.037 0.000 0.000
y 0.000 -26.037 0.000
z 0.000 0.000 -22.432
Traceless
 xyz
x -1.803 0.000 0.000
y 0.000 -1.803 0.000
z 0.000 0.000 3.605
Polar
3z2-r27.210
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 5.086 0.000 0.000
y 0.000 5.086 0.000
z 0.000 0.000 7.001


<r2> (average value of r2) Å2
<r2> 49.531
(<r2>)1/2 7.038