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

using model chemistry: B3PW91/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/cc-pVDZ
 hartrees
Energy at 0K-2614.038105
Energy at 298.15K 
HF Energy-2614.038105
Nuclear repulsion energy88.884576
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/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 3086 2978 16.06      
2 A1 1306 1261 21.21      
3 A1 616 594 12.14      
4 E 3213 3100 1.16      
4 E 3213 3100 1.16      
5 E 1443 1392 6.90      
5 E 1443 1392 6.90      
6 E 953 920 6.35      
6 E 953 920 6.34      

Unscaled Zero Point Vibrational Energy (zpe) 8112.1 cm-1
Scaled (by 0.965) Zero Point Vibrational Energy (zpe) 7828.2 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 B3PW91/cc-pVDZ
ABC
5.13118 0.31801 0.31801

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

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.523
Br2 0.000 0.000 0.421
H3 0.000 1.042 -1.861
H4 0.903 -0.521 -1.861
H5 -0.903 -0.521 -1.861

Atom - Atom Distances (Å)
  C1 Br2 H3 H4 H5
C11.94411.09571.09571.0957
Br21.94412.50862.50862.5086
H31.09572.50861.80551.8055
H41.09572.50861.80551.8055
H51.09572.50861.80551.8055

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 107.949 Br2 C1 H4 107.949
Br2 C1 H5 107.949 H3 C1 H4 110.950
H3 C1 H5 110.950 H4 C1 H5 110.950
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.176      
2 Br -0.128      
3 H 0.101      
4 H 0.101      
5 H 0.101      


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 -1.859 1.859
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -25.445 0.000 0.000
y 0.000 -25.445 0.000
z 0.000 0.000 -21.783
Traceless
 xyz
x -1.831 0.000 0.000
y 0.000 -1.831 0.000
z 0.000 0.000 3.662
Polar
3z2-r27.325
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 2.936 0.000 0.000
y 0.000 2.936 0.000
z 0.000 0.000 5.404


<r2> (average value of r2) Å2
<r2> 48.898
(<r2>)1/2 6.993