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All results from a given calculation for CH2Br2 (dibromomethane)

using model chemistry: B3LYPultrafine/3-21G

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/3-21G
 hartrees
Energy at 0K-5162.689918
Energy at 298.15K 
HF Energy-5162.689918
Nuclear repulsion energy340.990429
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/3-21G
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 3171 3060 3.59 98.82 0.09 0.16
2 A1 1482 1430 0.08 19.85 0.74 0.85
3 A1 552 533 4.76 14.67 0.15 0.26
4 A1 165 159 0.06 8.30 0.54 0.71
5 A2 1140 1100 0.00 18.63 0.75 0.86
6 B1 3259 3145 0.06 61.06 0.75 0.86
7 B1 807 779 9.47 5.84 0.75 0.86
8 B2 1246 1202 64.00 2.13 0.75 0.86
9 B2 635 612 108.29 7.10 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 6228.4 cm-1
Scaled (by 0.9649) Zero Point Vibrational Energy (zpe) 6009.8 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/3-21G
ABC
0.85856 0.03805 0.03669

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYPultrafine/3-21G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.949
H2 -0.901 0.000 1.552
H3 0.901 0.000 1.552
Br4 0.000 1.672 -0.126
Br5 0.000 -1.672 -0.126

Atom - Atom Distances (Å)
  C1 H2 H3 Br4 Br5
C11.08391.08391.98811.9881
H21.08391.80142.53442.5344
H31.08391.80142.53442.5344
Br41.98812.53442.53443.3447
Br51.98812.53442.53443.3447

picture of dibromomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H2 C1 H3 112.406 H2 C1 Br4 107.505
H2 C1 Br5 107.505 H3 C1 Br4 107.505
H3 C1 Br5 107.505 Br4 C1 Br5 114.533
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYPultrafine/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.809      
2 H 0.297      
3 H 0.297      
4 Br 0.107      
5 Br 0.107      


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 1.570 1.570
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -42.650 0.000 0.000
y 0.000 -44.070 0.000
z 0.000 0.000 -40.500
Traceless
 xyz
x -0.365 0.000 0.000
y 0.000 -2.495 0.000
z 0.000 0.000 2.860
Polar
3z2-r25.720
x2-y21.420
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.324 0.000 0.000
y 0.000 8.388 0.000
z 0.000 0.000 3.662


<r2> (average value of r2) Å2
<r2> 235.214
(<r2>)1/2 15.337