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All results from a given calculation for CH2I2 (Diiodomethane)

using model chemistry: PBEPBE/STO-3G

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/STO-3G
 hartrees
Energy at 0K-13743.193258
Energy at 298.15K 
HF Energy-13743.193258
Nuclear repulsion energy603.540872
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/STO-3G
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 3286 3002 0.01 42.86 0.11 0.20
2 A1 1574 1438 0.00 19.28 0.69 0.81
3 A1 528 483 5.07 12.11 0.14 0.24
4 A1 130 119 0.35 6.37 0.49 0.66
5 A2 1192 1089 0.00 13.06 0.75 0.86
6 B1 3410 3115 0.05 32.62 0.75 0.86
7 B1 780 712 0.82 2.47 0.75 0.86
8 B2 1260 1152 79.55 2.13 0.75 0.86
9 B2 667 610 79.05 7.01 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 6413.9 cm-1
Scaled (by 0.9136) Zero Point Vibrational Energy (zpe) 5859.8 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/STO-3G
ABC
0.79145 0.01922 0.01883

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.013
I2 0.000 1.857 -0.089
I3 0.000 -1.857 -0.089
H4 -0.897 0.000 1.660
H5 0.897 0.000 1.660

Atom - Atom Distances (Å)
  C1 I2 I3 H4 H5
C12.15932.15931.10671.1067
I22.15933.71462.70442.7044
I32.15933.71462.70442.7044
H41.10672.70442.70441.7949
H51.10672.70442.70441.7949

picture of Diiodomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
I2 C1 I3 118.663 I2 C1 H4 107.366
I2 C1 H5 107.366 I3 C1 H4 107.366
I3 C1 H5 107.366 H4 C1 H5 108.369
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/STO-3G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.304      
2 I 0.036      
3 I 0.036      
4 H 0.116      
5 H 0.116      


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 1.488 1.488
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -59.004 0.000 0.000
y 0.000 -61.987 0.000
z 0.000 0.000 -57.231
Traceless
 xyz
x 0.605 0.000 0.000
y 0.000 -3.869 0.000
z 0.000 0.000 3.264
Polar
3z2-r26.528
x2-y22.983
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.127 0.000 0.000
y 0.000 7.479 0.000
z 0.000 0.000 2.262


<r2> (average value of r2) Å2
<r2> 416.874
(<r2>)1/2 20.417