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All results from a given calculation for CH2I2 (Diiodomethane)

using model chemistry: PBEPBE/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 PBEPBE/6-311G**
 hartrees
Energy at 0K-13877.095615
Energy at 298.15K 
HF Energy-13877.095615
Nuclear repulsion energy606.120719
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 PBEPBE/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 3072 3044 0.02 86.21 0.07 0.13
2 A1 1359 1346 0.00 21.63 0.51 0.68
3 A1 469 465 0.22 16.52 0.10 0.18
4 A1 113 112 0.02 8.08 0.40 0.58
5 A2 1030 1021 0.00 2.92 0.75 0.86
6 B1 3160 3132 3.74 48.26 0.75 0.86
7 B1 700 693 10.25 1.33 0.75 0.86
8 B2 1110 1100 103.41 0.02 0.75 0.86
9 B2 536 531 79.57 5.22 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 5774.3 cm-1
Scaled (by 0.9909) Zero Point Vibrational Energy (zpe) 5721.8 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 PBEPBE/6-311G**
ABC
0.75432 0.01951 0.01909

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.050
I2 0.000 1.843 -0.091
I3 0.000 -1.843 -0.091
H4 -0.905 0.000 1.661
H5 0.905 0.000 1.661

Atom - Atom Distances (Å)
  C1 I2 I3 H4 H5
C12.16792.16791.09161.0916
I22.16793.68672.69912.6991
I32.16793.68672.69912.6991
H41.09162.69912.69911.8093
H51.09162.69912.69911.8093

picture of Diiodomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
I2 C1 I3 116.490 I2 C1 H4 107.129
I2 C1 H5 107.129 I3 C1 H4 107.129
I3 C1 H5 107.129 H4 C1 H5 111.941
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/6-311G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.580      
2 I 0.062      
3 I 0.062      
4 H 0.228      
5 H 0.228      


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 1.290 1.290
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -64.254 0.000 0.000
y 0.000 -63.569 0.000
z 0.000 0.000 -61.155
Traceless
 xyz
x -1.892 0.000 0.000
y 0.000 -0.865 0.000
z 0.000 0.000 2.757
Polar
3z2-r25.514
x2-y2-0.685
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.382 0.000 0.000
y 0.000 14.951 0.000
z 0.000 0.000 7.534


<r2> (average value of r2) Å2
<r2> 414.166
(<r2>)1/2 20.351