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

using model chemistry: B3LYP/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 B3LYP/cc-pVTZ
 hartrees
Energy at 0K-2614.161029
Energy at 298.15K 
HF Energy-2614.161029
Nuclear repulsion energy88.543115
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 B3LYP/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 3082 2979 16.66      
2 A1 1330 1285 20.98      
3 A1 591 571 12.14      
4 E 3186 3079 2.27      
4 E 3186 3079 2.27      
5 E 1477 1428 5.72      
5 E 1477 1428 5.72      
6 E 963 931 4.68      
6 E 963 931 4.68      

Unscaled Zero Point Vibrational Energy (zpe) 8127.1 cm-1
Scaled (by 0.9666) Zero Point Vibrational Energy (zpe) 7855.6 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 B3LYP/cc-pVTZ
ABC
5.23050 0.31431 0.31431

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/cc-pVTZ

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.536
Br2 0.000 0.000 0.423
H3 0.000 1.032 -1.865
H4 0.894 -0.516 -1.865
H5 -0.894 -0.516 -1.865

Atom - Atom Distances (Å)
  C1 Br2 H3 H4 H5
C11.95901.08351.08351.0835
Br21.95902.50992.50992.5099
H31.08352.50991.78831.7883
H41.08352.50991.78831.7883
H51.08352.50991.78831.7883

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 107.657 Br2 C1 H4 107.657
Br2 C1 H5 107.657 H3 C1 H4 111.222
H3 C1 H5 111.222 H4 C1 H5 111.222
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.256      
2 Br -0.126      
3 H 0.127      
4 H 0.127      
5 H 0.127      


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 -1.930 1.930
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -25.951 0.000 0.000
y 0.000 -25.951 0.000
z 0.000 0.000 -22.270
Traceless
 xyz
x -1.841 0.000 0.000
y 0.000 -1.841 0.000
z 0.000 0.000 3.681
Polar
3z2-r27.363
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 3.735 0.000 0.000
y 0.000 3.735 0.000
z 0.000 0.000 6.190


<r2> (average value of r2) Å2
<r2> 49.489
(<r2>)1/2 7.035