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All results from a given calculation for CH2I2 (Diiodomethane)

using model chemistry: PBEPBEultrafine/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 PBEPBEultrafine/6-311G*
 hartrees
Energy at 0K-13877.092549
Energy at 298.15K 
HF Energy-13877.092549
Nuclear repulsion energy605.890580
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 PBEPBEultrafine/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 3073 3041 0.25 80.57 0.08 0.15
2 A1 1378 1364 0.01 21.63 0.52 0.68
3 A1 470 465 0.21 16.82 0.10 0.18
4 A1 113 112 0.02 8.10 0.40 0.58
5 A2 1048 1037 0.00 3.30 0.75 0.86
6 B1 3160 3128 2.59 47.86 0.75 0.86
7 B1 707 699 11.61 1.49 0.75 0.86
8 B2 1125 1114 106.79 0.01 0.75 0.86
9 B2 537 532 80.38 5.17 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 5805.3 cm-1
Scaled (by 0.9896) Zero Point Vibrational Energy (zpe) 5745.0 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 PBEPBEultrafine/6-311G*
ABC
0.75405 0.01949 0.01907

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBEultrafine/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 1.844 -0.091
I3 0.000 -1.844 -0.091
H4 -0.903 0.000 1.664
H5 0.903 0.000 1.664

Atom - Atom Distances (Å)
  C1 I2 I3 H4 H5
C12.16842.16841.09151.0915
I22.16843.68822.70082.7008
I32.16843.68822.70082.7008
H41.09152.70082.70081.8051
H51.09152.70082.70081.8051

picture of Diiodomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
I2 C1 I3 116.518 I2 C1 H4 107.211
I2 C1 H5 107.211 I3 C1 H4 107.211
I3 C1 H5 107.211 H4 C1 H5 111.551
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBEultrafine/6-311G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.795      
2 I 0.085      
3 I 0.085      
4 H 0.312      
5 H 0.312      


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 1.304 1.304
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -64.272 0.000 0.000
y 0.000 -63.589 0.000
z 0.000 0.000 -61.158
Traceless
 xyz
x -1.898 0.000 0.000
y 0.000 -0.874 0.000
z 0.000 0.000 2.772
Polar
3z2-r25.545
x2-y2-0.683
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.354 0.000 0.000
y 0.000 14.934 0.000
z 0.000 0.000 7.499


<r2> (average value of r2) Å2
<r2> 414.479
(<r2>)1/2 20.359