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All results from a given calculation for CH2I2 (Diiodomethane)

using model chemistry: wB97X-D/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 wB97X-D/3-21G
 hartrees
Energy at 0K-13820.461690
Energy at 298.15K 
HF Energy-13820.461690
Nuclear repulsion energy604.608357
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 wB97X-D/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 3181 3181 0.42 94.68 0.09 0.17
2 A1 1494 1494 1.99 33.41 0.64 0.78
3 A1 495 495 0.47 21.78 0.16 0.28
4 A1 123 123 0.01 8.05 0.51 0.67
5 A2 1134 1134 0.00 19.20 0.75 0.86
6 B1 3263 3263 1.86 63.06 0.75 0.86
7 B1 758 758 14.60 4.82 0.75 0.86
8 B2 1225 1225 91.31 0.41 0.75 0.86
9 B2 625 625 45.35 18.70 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 6148.9 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 6148.9 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 wB97X-D/3-21G
ABC
0.74453 0.01943 0.01900

See section I.F.4 to change rotational constant units
Geometric Data calculated at wB97X-D/3-21G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.058
I2 0.000 1.847 -0.092
I3 0.000 -1.847 -0.092
H4 -0.893 0.000 1.677
H5 0.893 0.000 1.677

Atom - Atom Distances (Å)
  C1 I2 I3 H4 H5
C12.17572.17571.08641.0864
I22.17573.69442.70852.7085
I32.17573.69442.70852.7085
H41.08642.70852.70851.7862
H51.08642.70852.70851.7862

picture of Diiodomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
I2 C1 I3 116.210 I2 C1 H4 107.508
I2 C1 H5 107.508 I3 C1 H4 107.508
I3 C1 H5 107.508 H4 C1 H5 110.588
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at wB97X-D/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -1.025      
2 I 0.202      
3 I 0.202      
4 H 0.311      
5 H 0.311      


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 1.367 1.367
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -64.009 0.000 0.000
y 0.000 -63.844 0.000
z 0.000 0.000 -61.218
Traceless
 xyz
x -1.479 0.000 0.000
y 0.000 -1.230 0.000
z 0.000 0.000 2.709
Polar
3z2-r25.417
x2-y2-0.166
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.445 0.000 0.000
y 0.000 11.796 0.000
z 0.000 0.000 4.922


<r2> (average value of r2) Å2
<r2> 415.869
(<r2>)1/2 20.393