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All results from a given calculation for CH2I2 (Diiodomethane)

using model chemistry: TPSSh/Def2TZVPP

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at TPSSh/Def2TZVPP
 hartrees
Energy at 0K-634.558161
Energy at 298.15K 
HF Energy-634.558161
Nuclear repulsion energy191.527675
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 TPSSh/Def2TZVPP
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 3129 3129 0.11 95.00 0.05 0.09
2 A1 1417 1417 0.43 19.82 0.50 0.67
3 A1 489 489 0.29 18.74 0.09 0.16
4 A1 113 113 0.02 5.65 0.37 0.54
5 A2 1048 1048 0.00 0.72 0.75 0.86
6 B1 3220 3220 3.74 44.70 0.75 0.86
7 B1 718 718 7.02 0.82 0.75 0.86
8 B2 1129 1129 108.54 1.49 0.75 0.86
9 B2 573 573 61.35 6.73 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 5917.1 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 5917.1 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 TPSSh/Def2TZVPP
ABC
0.75665 0.02023 0.01978

See section I.F.4 to change rotational constant units
Geometric Data calculated at TPSSh/Def2TZVPP

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.050
I2 0.000 1.810 -0.091
I3 0.000 -1.810 -0.091
H4 -0.899 0.000 1.654
H5 0.899 0.000 1.654

Atom - Atom Distances (Å)
  C1 I2 I3 H4 H5
C12.13982.13981.08241.0824
I22.13983.62042.66972.6697
I32.13983.62042.66972.6697
H41.08242.66972.66971.7973
H51.08242.66972.66971.7973

picture of Diiodomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
I2 C1 I3 115.550 I2 C1 H4 107.293
I2 C1 H5 107.293 I3 C1 H4 107.293
I3 C1 H5 107.293 H4 C1 H5 112.241
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at TPSSh/Def2TZVPP Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.254      
2 I -0.043      
3 I -0.043      
4 H 0.170      
5 H 0.170      


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 1.186 1.186
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 8.029 0.000 0.000
y 0.000 16.112 0.000
z 0.000 0.000 9.072


<r2> (average value of r2) Å2
<r2> 215.178
(<r2>)1/2 14.669