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

using model chemistry: B1B95/daug-cc-pVDZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A1
Energy calculated at B1B95/daug-cc-pVDZ
 hartrees
Energy at 0K-2614.366490
Energy at 298.15K 
HF Energy-2614.366490
Nuclear repulsion energy89.252718
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 B1B95/daug-cc-pVDZ
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 3100 3100 16.80 155.26 0.00 0.01
2 A1 1299 1299 16.28 0.82 0.06 0.11
3 A1 628 628 12.05 21.65 0.16 0.28
4 E 3223 3223 1.47 54.37 0.75 0.86
4 E 3223 3223 1.47 54.36 0.75 0.86
5 E 1437 1437 5.78 3.61 0.75 0.86
5 E 1437 1437 5.78 3.60 0.75 0.86
6 E 954 954 3.87 0.40 0.75 0.86
6 E 954 954 3.87 0.40 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 8126.9 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 8126.9 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 B1B95/daug-cc-pVDZ
ABC
5.18151 0.32057 0.32057

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/daug-cc-pVDZ

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 1.037 -1.853
H4 0.898 -0.519 -1.853
H5 -0.898 -0.519 -1.853

Atom - Atom Distances (Å)
  C1 Br2 H3 H4 H5
C11.93661.09021.09021.0902
Br21.93662.49752.49752.4975
H31.09022.49751.79671.7967
H41.09022.49751.79671.7967
H51.09022.49751.79671.7967

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 107.913 Br2 C1 H4 107.913
Br2 C1 H5 107.913 H3 C1 H4 110.983
H3 C1 H5 110.983 H4 C1 H5 110.983
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/daug-cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.294      
2 Br 0.217      
3 H -0.170      
4 H -0.170      
5 H -0.170      


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 -1.916 1.916
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -25.885 0.000 0.000
y 0.000 -25.885 0.000
z 0.000 0.000 -22.132
Traceless
 xyz
x -1.877 0.000 0.000
y 0.000 -1.877 0.000
z 0.000 0.000 3.753
Polar
3z2-r27.506
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 4.842 0.000 0.000
y 0.000 4.843 0.000
z 0.000 0.000 6.719


<r2> (average value of r2) Å2
<r2> 48.876
(<r2>)1/2 6.991