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All results from a given calculation for CH2I2 (Diiodomethane)

using model chemistry: HSEh1PBE/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at HSEh1PBE/3-21G*
 hartrees
Energy at 0K-13819.226268
Energy at 298.15K 
HF Energy-13819.226268
Nuclear repulsion energy610.377118
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 HSEh1PBE/3-21G*
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 3157 3030 0.01 75.42 0.08 0.14
2 A1 1466 1407 0.36 25.99 0.62 0.77
3 A1 506 486 0.35 17.39 0.09 0.17
4 A1 116 112 0.01 5.65 0.39 0.56
5 A2 1101 1057 0.00 5.77 0.75 0.86
6 B1 3246 3116 5.52 49.86 0.75 0.86
7 B1 739 709 11.55 1.69 0.75 0.86
8 B2 1183 1136 79.78 0.00 0.75 0.86
9 B2 611 586 49.79 7.59 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 6062.0 cm-1
Scaled (by 0.9599) Zero Point Vibrational Energy (zpe) 5818.9 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 HSEh1PBE/3-21G*
ABC
0.72892 0.01991 0.01945

See section I.F.4 to change rotational constant units
Geometric Data calculated at HSEh1PBE/3-21G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.072
I2 0.000 1.825 -0.092
I3 0.000 -1.825 -0.092
H4 -0.900 0.000 1.684
H5 0.900 0.000 1.684

Atom - Atom Distances (Å)
  C1 I2 I3 H4 H5
C12.16502.16501.08811.0881
I22.16503.64992.70122.7012
I32.16503.64992.70122.7012
H41.08812.70122.70121.7998
H51.08812.70122.70121.7998

picture of Diiodomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
I2 C1 I3 114.898 I2 C1 H4 107.606
I2 C1 H5 107.606 I3 C1 H4 107.606
I3 C1 H5 107.606 H4 C1 H5 111.592
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HSEh1PBE/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.757      
2 I 0.081      
3 I 0.081      
4 H 0.298      
5 H 0.298      


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 1.202 1.202
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -63.926 0.000 0.000
y 0.000 -62.706 0.000
z 0.000 0.000 -60.577
Traceless
 xyz
x -2.284 0.000 0.000
y 0.000 -0.455 0.000
z 0.000 0.000 2.739
Polar
3z2-r25.478
x2-y2-1.220
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.704 0.000 0.000
y 0.000 13.860 0.000
z 0.000 0.000 7.527


<r2> (average value of r2) Å2
<r2> 407.095
(<r2>)1/2 20.177