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

using model chemistry: ROHF/aug-cc-pVTZ

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/aug-cc-pVTZ
 hartrees
Energy at 0K-2612.093136
Energy at 298.15K 
HF Energy-2612.093136
Nuclear repulsion energy89.265678
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/aug-cc-pVTZ
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 26.75      
2 A1 1455 1455 33.96      
3 A1 642 642 23.54      
4 E 3331 3331 3.19      
4 E 3331 3331 3.19      
5 E 1595 1595 5.70      
5 E 1595 1595 5.70      
6 E 1052 1052 2.85      
6 E 1052 1052 2.85      

Unscaled Zero Point Vibrational Energy (zpe) 8638.0 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 8638.0 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/aug-cc-pVTZ
ABC
5.31410 0.31949 0.31949

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

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 0.420
H3 0.000 1.024 -1.850
H4 0.887 -0.512 -1.850
H5 -0.887 -0.512 -1.850

Atom - Atom Distances (Å)
  C1 Br2 H3 H4 H5
C11.94281.07521.07521.0752
Br21.94282.49012.49012.4901
H31.07522.49011.77421.7742
H41.07522.49011.77421.7742
H51.07522.49011.77421.7742

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 107.698 Br2 C1 H4 107.698
Br2 C1 H5 107.698 H3 C1 H4 111.185
H3 C1 H5 111.185 H4 C1 H5 111.185
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at ROHF/aug-cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.749      
2 Br -0.109      
3 H 0.286      
4 H 0.286      
5 H 0.286      


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 -2.176 2.176
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -26.027 0.000 0.000
y 0.000 -26.028 -0.001
z 0.000 -0.001 -22.198
Traceless
 xyz
x -1.914 0.000 0.000
y 0.000 -1.915 -0.001
z 0.000 -0.001 3.829
Polar
3z2-r27.658
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> 48.959
(<r2>)1/2 6.997