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All results from a given calculation for CH2I2 (Diiodomethane)

using model chemistry: BLYP/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 BLYP/6-311G**
 hartrees
Energy at 0K-13878.350446
Energy at 298.15K 
HF Energy-13878.350446
Nuclear repulsion energy597.107525
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 BLYP/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 3066 3054 0.21 86.24 0.08 0.15
2 A1 1368 1363 0.21 24.08 0.49 0.66
3 A1 445 443 0.33 19.08 0.11 0.19
4 A1 110 109 0.01 9.10 0.40 0.57
5 A2 1025 1021 0.00 2.62 0.75 0.86
6 B1 3156 3143 2.22 49.79 0.75 0.86
7 B1 696 693 9.82 1.37 0.75 0.86
8 B2 1110 1106 119.50 0.32 0.75 0.86
9 B2 492 490 93.93 6.51 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 5733.6 cm-1
Scaled (by 0.9961) Zero Point Vibrational Energy (zpe) 5711.3 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 BLYP/6-311G**
ABC
0.74645 0.01888 0.01848

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.058
I2 0.000 1.874 -0.091
I3 0.000 -1.874 -0.091
H4 -0.905 0.000 1.663
H5 0.905 0.000 1.663

Atom - Atom Distances (Å)
  C1 I2 I3 H4 H5
C12.19822.19821.08851.0885
I22.19823.74752.72152.7215
I32.19823.74752.72152.7215
H41.08852.72152.72151.8101
H51.08852.72152.72151.8101

picture of Diiodomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
I2 C1 I3 116.950 I2 C1 H4 106.886
I2 C1 H5 106.886 I3 C1 H4 106.886
I3 C1 H5 106.886 H4 C1 H5 112.506
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at BLYP/6-311G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.516      
2 I 0.053      
3 I 0.053      
4 H 0.206      
5 H 0.206      


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 1.275 1.275
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -64.632 0.000 0.000
y 0.000 -63.940 0.000
z 0.000 0.000 -61.600
Traceless
 xyz
x -1.862 0.000 0.000
y 0.000 -0.824 0.000
z 0.000 0.000 2.686
Polar
3z2-r25.372
x2-y2-0.692
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.384 0.000 0.000
y 0.000 15.537 0.000
z 0.000 0.000 7.576


<r2> (average value of r2) Å2
<r2> 426.522
(<r2>)1/2 20.652