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

using model chemistry: mPW1PW91/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 mPW1PW91/cc-pVTZ-PP
 hartrees
Energy at 0K-456.878578
Energy at 298.15K 
HF Energy-456.878578
Nuclear repulsion energy66.577379
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 mPW1PW91/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 3101 3101 15.83 134.50 0.00 0.00
2 A1 1332 1332 18.18 0.01 0.01 0.01
3 A1 629 629 10.61 19.41 0.22 0.36
4 E 3211 3211 1.63 53.89 0.75 0.86
4 E 3211 3211 1.63 53.88 0.75 0.86
5 E 1476 1476 6.04 5.99 0.75 0.86
5 E 1476 1476 6.04 6.00 0.75 0.86
6 E 967 967 5.15 1.98 0.75 0.86
6 E 967 967 5.15 1.98 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 8184.6 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 8184.6 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 mPW1PW91/cc-pVTZ-PP
ABC
5.24103 0.32075 0.32075

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/cc-pVTZ-PP

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.518
Br2 0.000 0.000 0.419
H3 0.000 1.031 -1.851
H4 0.893 -0.516 -1.851
H5 -0.893 -0.516 -1.851

Atom - Atom Distances (Å)
  C1 Br2 H3 H4 H5
C11.93701.08371.08371.0837
Br21.93702.49302.49302.4930
H31.08372.49301.78651.7865
H41.08372.49301.78651.7865
H51.08372.49301.78651.7865

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 107.874 Br2 C1 H4 107.874
Br2 C1 H5 107.874 H3 C1 H4 111.021
H3 C1 H5 111.021 H4 C1 H5 111.021
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/cc-pVTZ-PP Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.236      
2 Br -0.112      
3 H 0.116      
4 H 0.116      
5 H 0.116      


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 -1.841 1.841
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -25.389 0.000 0.000
y 0.000 -25.389 0.000
z 0.000 0.000 -21.757
Traceless
 xyz
x -1.816 0.000 0.000
y 0.000 -1.816 0.000
z 0.000 0.000 3.632
Polar
3z2-r27.265
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 3.859 0.000 0.000
y 0.000 3.859 0.000
z 0.000 0.000 6.070


<r2> (average value of r2) Å2
<r2> 46.783
(<r2>)1/2 6.840