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

using model chemistry: ROHF/cc-pVTZ-PP

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A1
Energy calculated at ROHF/cc-pVTZ-PP
 hartrees
Energy at 0K-455.137470
Energy at 298.15K 
HF Energy-455.137470
Nuclear repulsion energy66.604764
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 ROHF/cc-pVTZ-PP
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 3224 3224 27.44      
2 A1 1454 1454 37.91      
3 A1 643 643 23.08      
4 E 3331 3331 4.26      
4 E 3331 3331 4.26      
5 E 1595 1595 5.23      
5 E 1595 1595 5.23      
6 E 1049 1049 3.80      
6 E 1049 1049 3.80      

Unscaled Zero Point Vibrational Energy (zpe) 8634.2 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 8634.2 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 ROHF/cc-pVTZ-PP
ABC
5.31267 0.32015 0.32015

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

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.521
Br2 0.000 0.000 0.419
H3 0.000 1.024 -1.848
H4 0.887 -0.512 -1.848
H5 -0.887 -0.512 -1.848

Atom - Atom Distances (Å)
  C1 Br2 H3 H4 H5
C11.94071.07531.07531.0753
Br21.94072.48812.48812.4881
H31.07532.48811.77441.7744
H41.07532.48811.77441.7744
H51.07532.48811.77441.7744

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 107.688 Br2 C1 H4 107.688
Br2 C1 H5 107.688 H3 C1 H4 111.194
H3 C1 H5 111.194 H4 C1 H5 111.194
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at ROHF/cc-pVTZ-PP Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.224      
2 Br -0.152      
3 H 0.125      
4 H 0.125      
5 H 0.125      


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 -2.112 2.112
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -25.597 0.000 0.000
y 0.000 -25.598 -0.001
z 0.000 -0.001 -21.775
Traceless
 xyz
x -1.911 0.000 0.000
y 0.000 -1.912 -0.001
z 0.000 -0.001 3.822
Polar
3z2-r27.645
x2-y20.001
xy0.000
xz0.000
yz-0.001


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 0.000 0.000 0.000
y 0.000 0.000 0.000
z 0.000 0.000 0.000


<r2> (average value of r2) Å2
<r2> 46.871
(<r2>)1/2 6.846