return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

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

using model chemistry: PBEPBE/aug-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 PBEPBE/aug-cc-pVDZ
 hartrees
Energy at 0K-2613.595640
Energy at 298.15K 
HF Energy-2613.595640
Nuclear repulsion energy88.221865
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/aug-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 3012 2994 15.28      
2 A1 1247 1239 15.39      
3 A1 588 585 10.48      
4 E 3133 3114 1.45      
4 E 3133 3114 1.45      
5 E 1384 1376 5.53      
5 E 1384 1376 5.53      
6 E 917 912 4.36      
6 E 917 912 4.36      

Unscaled Zero Point Vibrational Energy (zpe) 7858.1 cm-1
Scaled (by 0.9939) Zero Point Vibrational Energy (zpe) 7810.2 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/aug-cc-pVDZ
ABC
5.07513 0.31305 0.31305

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

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.537
Br2 0.000 0.000 0.424
H3 0.000 1.048 -1.872
H4 0.908 -0.524 -1.872
H5 -0.908 -0.524 -1.872

Atom - Atom Distances (Å)
  C1 Br2 H3 H4 H5
C11.96071.10041.10041.1004
Br21.96072.52392.52392.5239
H31.10042.52391.81541.8154
H41.10042.52391.81541.8154
H51.10042.52391.81541.8154

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 107.734 Br2 C1 H4 107.734
Br2 C1 H5 107.734 H3 C1 H4 111.151
H3 C1 H5 111.151 H4 C1 H5 111.151
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/aug-cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.282      
2 Br 0.144      
3 H -0.142      
4 H -0.142      
5 H -0.142      


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 -1.893 1.893
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -26.121 0.000 0.000
y 0.000 -26.121 0.000
z 0.000 0.000 -22.342
Traceless
 xyz
x -1.890 0.000 0.000
y 0.000 -1.890 0.000
z 0.000 0.000 3.780
Polar
3z2-r27.559
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 4.773 0.000 0.000
y 0.000 4.773 0.000
z 0.000 0.000 6.847


<r2> (average value of r2) Å2
<r2> 49.798
(<r2>)1/2 7.057