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All results from a given calculation for CH2Br2 (dibromomethane)

using model chemistry: B3LYPultrafine/6-311G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at B3LYPultrafine/6-311G*
 hartrees
Energy at 0K-5187.606414
Energy at 298.15K 
HF Energy-5187.606414
Nuclear repulsion energy347.155608
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 B3LYPultrafine/6-311G*
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 3140 3034 4.42 88.01 0.08 0.15
2 A1 1452 1403 0.07 13.36 0.66 0.79
3 A1 569 550 4.05 15.08 0.10 0.18
4 A1 169 163 0.06 6.23 0.47 0.64
5 A2 1133 1095 0.00 7.24 0.75 0.86
6 B1 3227 3118 0.09 53.70 0.75 0.86
7 B1 821 793 8.11 2.49 0.75 0.86
8 B2 1241 1199 82.11 1.03 0.75 0.86
9 B2 617 597 117.71 5.88 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 6183.8 cm-1
Scaled (by 0.9663) Zero Point Vibrational Energy (zpe) 5975.4 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 B3LYPultrafine/6-311G*
ABC
0.88196 0.03952 0.03810

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYPultrafine/6-311G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.933
H2 -0.898 0.000 1.539
H3 0.898 0.000 1.539
Br4 0.000 1.641 -0.124
Br5 0.000 -1.641 -0.124

Atom - Atom Distances (Å)
  C1 H2 H3 Br4 Br5
C11.08291.08291.95201.9520
H21.08291.79582.50262.5026
H31.08291.79582.50262.5026
Br41.95202.50262.50263.2817
Br51.95202.50262.50263.2817

picture of dibromomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H2 C1 H3 112.028 H2 C1 Br4 107.624
H2 C1 Br5 107.624 H3 C1 Br4 107.624
H3 C1 Br5 107.624 Br4 C1 Br5 114.409
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYPultrafine/6-311G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.604      
2 H 0.294      
3 H 0.294      
4 Br 0.008      
5 Br 0.008      


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 1.595 1.595
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -43.412 0.000 0.000
y 0.000 -44.720 0.000
z 0.000 0.000 -40.941
Traceless
 xyz
x -0.582 0.000 0.000
y 0.000 -2.543 0.000
z 0.000 0.000 3.125
Polar
3z2-r26.250
x2-y21.308
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.003 0.000 0.000
y 0.000 9.462 0.000
z 0.000 0.000 5.130


<r2> (average value of r2) Å2
<r2> 227.989
(<r2>)1/2 15.099