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All results from a given calculation for CH2I2 (Diiodomethane)

using model chemistry: PBE1PBE/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 PBE1PBE/6-311G**
 hartrees
Energy at 0K-13877.469578
Energy at 298.15K 
HF Energy-13877.469578
Nuclear repulsion energy613.775858
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 PBE1PBE/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 3156 3028 0.01 84.57 0.07 0.13
2 A1 1410 1353 0.04 19.20 0.52 0.68
3 A1 498 477 0.28 17.87 0.10 0.19
4 A1 119 114 0.03 6.06 0.41 0.59
5 A2 1079 1035 0.00 3.20 0.75 0.86
6 B1 3245 3113 4.86 47.67 0.75 0.86
7 B1 728 698 10.29 1.26 0.75 0.86
8 B2 1161 1113 105.68 0.27 0.75 0.86
9 B2 593 569 54.54 8.06 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 5993.9 cm-1
Scaled (by 0.9594) Zero Point Vibrational Energy (zpe) 5750.6 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 PBE1PBE/6-311G**
ABC
0.76170 0.02005 0.01961

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBE1PBE/6-311G**

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.045
I2 0.000 1.819 -0.090
I3 0.000 -1.819 -0.090
H4 -0.896 0.000 1.656
H5 0.896 0.000 1.656

Atom - Atom Distances (Å)
  C1 I2 I3 H4 H5
C12.14382.14381.08451.0845
I22.14383.63702.67562.6756
I32.14383.63702.67562.6756
H41.08452.67562.67561.7924
H51.08452.67562.67561.7924

picture of Diiodomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
I2 C1 I3 116.049 I2 C1 H4 107.350
I2 C1 H5 107.350 I3 C1 H4 107.350
I3 C1 H5 107.350 H4 C1 H5 111.453
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBE1PBE/6-311G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.591      
2 I 0.064      
3 I 0.064      
4 H 0.232      
5 H 0.232      


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 1.342 1.342
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -64.117 0.000 0.000
y 0.000 -63.611 0.000
z 0.000 0.000 -60.956
Traceless
 xyz
x -1.834 0.000 0.000
y 0.000 -1.074 0.000
z 0.000 0.000 2.908
Polar
3z2-r25.816
x2-y2-0.506
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.258 0.000 0.000
y 0.000 14.045 0.000
z 0.000 0.000 7.384


<r2> (average value of r2) Å2
<r2> 404.327
(<r2>)1/2 20.108