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

using model chemistry: B3PW91/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 B3PW91/aug-cc-pVDZ
 hartrees
Energy at 0K-2614.043404
Energy at 298.15K 
HF Energy-2614.043404
Nuclear repulsion energy88.825590
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/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 3084 2975 16.69      
2 A1 1296 1250 16.49      
3 A1 612 590 12.13      
4 E 3207 3093 1.50      
4 E 3207 3093 1.50      
5 E 1432 1382 6.01      
5 E 1432 1382 6.01      
6 E 950 917 4.27      
6 E 950 917 4.27      

Unscaled Zero Point Vibrational Energy (zpe) 8085.1 cm-1
Scaled (by 0.9646) Zero Point Vibrational Energy (zpe) 7798.9 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/aug-cc-pVDZ
ABC
5.14673 0.31736 0.31736

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/aug-cc-pVDZ

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.526
Br2 0.000 0.000 0.421
H3 0.000 1.041 -1.860
H4 0.901 -0.520 -1.860
H5 -0.901 -0.520 -1.860

Atom - Atom Distances (Å)
  C1 Br2 H3 H4 H5
C11.94711.09321.09321.0932
Br21.94712.50752.50752.5075
H31.09322.50751.80281.8028
H41.09322.50751.80281.8028
H51.09322.50751.80281.8028

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 107.801 Br2 C1 H4 107.801
Br2 C1 H5 107.801 H3 C1 H4 111.089
H3 C1 H5 111.089 H4 C1 H5 111.089
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/aug-cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.144      
2 Br 0.148      
3 H -0.097      
4 H -0.097      
5 H -0.097      


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 -1.958 1.958
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -25.877 0.000 0.000
y 0.000 -25.877 0.000
z 0.000 0.000 -22.083
Traceless
 xyz
x -1.897 0.000 0.000
y 0.000 -1.897 0.000
z 0.000 0.000 3.795
Polar
3z2-r27.589
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 4.601 0.000 0.000
y 0.000 4.601 0.000
z 0.000 0.000 6.634


<r2> (average value of r2) Å2
<r2> 49.182
(<r2>)1/2 7.013