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: LSDA/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 LSDA/aug-cc-pVDZ
 hartrees
Energy at 0K-2611.007173
Energy at 298.15K 
HF Energy-2611.007173
Nuclear repulsion energy89.388453
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 LSDA/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 3013 2979 10.98      
2 A1 1233 1219 7.65      
3 A1 629 622 8.38      
4 E 3136 3101 0.03      
4 E 3136 3101 0.03      
5 E 1362 1347 7.82      
5 E 1362 1347 7.82      
6 E 912 901 5.46      
6 E 912 901 5.46      

Unscaled Zero Point Vibrational Energy (zpe) 7847.7 cm-1
Scaled (by 0.9887) Zero Point Vibrational Energy (zpe) 7759.1 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 LSDA/aug-cc-pVDZ
ABC
5.08492 0.32257 0.32257

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

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.510
Br2 0.000 0.000 0.418
H3 0.000 1.047 -1.853
H4 0.907 -0.524 -1.853
H5 -0.907 -0.524 -1.853

Atom - Atom Distances (Å)
  C1 Br2 H3 H4 H5
C11.92771.10191.10191.1019
Br21.92772.50062.50062.5006
H31.10192.50061.81371.8137
H41.10192.50061.81371.8137
H51.10192.50061.81371.8137

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 108.143 Br2 C1 H4 108.143
Br2 C1 H5 108.143 H3 C1 H4 110.766
H3 C1 H5 110.766 H4 C1 H5 110.766
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at LSDA/aug-cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.254      
2 Br 0.191      
3 H -0.148      
4 H -0.148      
5 H -0.148      


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 -1.867 1.867
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -26.016 0.000 0.000
y 0.000 -26.016 0.000
z 0.000 0.000 -22.378
Traceless
 xyz
x -1.819 0.000 0.000
y 0.000 -1.819 0.000
z 0.000 0.000 3.638
Polar
3z2-r27.276
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 4.721 0.000 0.000
y 0.000 4.721 -0.000
z 0.000 -0.000 6.702


<r2> (average value of r2) Å2
<r2> 48.869
(<r2>)1/2 6.991