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

using model chemistry: BLYP/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 BLYP/cc-pVTZ-PP
 hartrees
Energy at 0K-456.718618
Energy at 298.15K 
HF Energy-456.718618
Nuclear repulsion energy65.218081
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 BLYP/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 3011 3011 15.84      
2 A1 1283 1283 22.28      
3 A1 556 556 10.95      
4 E 3112 3112 3.17      
4 E 3112 3112 3.17      
5 E 1439 1439 4.85      
5 E 1439 1439 4.85      
6 E 926 926 4.53      
6 E 926 926 4.53      

Unscaled Zero Point Vibrational Energy (zpe) 7901.7 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 7901.7 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 BLYP/cc-pVTZ-PP
ABC
5.15639 0.30609 0.30609

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

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.559
Br2 0.000 0.000 0.429
H3 0.000 1.040 -1.884
H4 0.901 -0.520 -1.884
H5 -0.901 -0.520 -1.884

Atom - Atom Distances (Å)
  C1 Br2 H3 H4 H5
C11.98741.08941.08941.0894
Br21.98742.53542.53542.5354
H31.08942.53541.80111.8011
H41.08942.53541.80111.8011
H51.08942.53541.80111.8011

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 107.350 Br2 C1 H4 107.350
Br2 C1 H5 107.350 H3 C1 H4 111.506
H3 C1 H5 111.506 H4 C1 H5 111.506
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at BLYP/cc-pVTZ-PP Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.270      
2 Br -0.104      
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 -1.797 1.797
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -25.746 0.000 0.000
y 0.000 -25.746 0.000
z 0.000 0.000 -22.035
Traceless
 xyz
x -1.856 0.000 0.000
y 0.000 -1.856 0.000
z 0.000 0.000 3.712
Polar
3z2-r27.423
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 3.965 0.000 0.000
y 0.000 3.965 0.000
z 0.000 0.000 6.382


<r2> (average value of r2) Å2
<r2> 48.368
(<r2>)1/2 6.955