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All results from a given calculation for CH2I2 (Diiodomethane)

using model chemistry: PBEPBEultrafine/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 PBEPBEultrafine/Def2TZVPP
 hartrees
Energy at 0K-634.656679
Energy at 298.15K 
HF Energy-634.656679
Nuclear repulsion energy190.774919
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/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 3065 3065 0.00 95.37 0.05 0.10
2 A1 1357 1357 0.10 21.03 0.50 0.67
3 A1 479 479 0.11 16.62 0.08 0.16
4 A1 112 112 0.01 6.31 0.37 0.54
5 A2 1013 1013 0.00 0.75 0.75 0.86
6 B1 3155 3155 4.51 43.85 0.75 0.86
7 B1 698 698 7.72 0.84 0.75 0.86
8 B2 1089 1089 89.57 0.69 0.75 0.86
9 B2 554 554 68.25 4.83 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 5761.4 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 5761.4 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/Def2TZVPP
ABC
0.75496 0.02005 0.01961

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.050
I2 0.000 1.818 -0.091
I3 0.000 -1.818 -0.091
H4 -0.905 0.000 1.658
H5 0.905 0.000 1.658

Atom - Atom Distances (Å)
  C1 I2 I3 H4 H5
C12.14652.14651.09001.0900
I22.14653.63632.68012.6801
I32.14653.63632.68012.6801
H41.09002.68012.68011.8091
H51.09002.68012.68011.8091

picture of Diiodomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
I2 C1 I3 115.782 I2 C1 H4 107.251
I2 C1 H5 107.251 I3 C1 H4 107.251
I3 C1 H5 107.251 H4 C1 H5 112.174
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBEultrafine/Def2TZVPP Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.362      
2 I -0.019      
3 I -0.019      
4 H 0.200      
5 H 0.200      


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 1.117 1.117
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -60.991 0.000 0.000
y 0.000 -60.253 0.000
z 0.000 0.000 -58.041
Traceless
 xyz
x -1.844 0.000 0.000
y 0.000 -0.737 0.000
z 0.000 0.000 2.582
Polar
3z2-r25.163
x2-y2-0.738
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 8.165 0.000 0.000
y 0.000 16.552 0.000
z 0.000 0.000 9.207


<r2> (average value of r2) Å2
<r2> 216.779
(<r2>)1/2 14.723