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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-13878.347378
Energy at 298.15K 
HF Energy-13878.347378
Nuclear repulsion energy596.931655
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 3067 3059 0.66 81.00 0.09 0.16
2 A1 1386 1382 0.17 24.05 0.50 0.66
3 A1 445 444 0.33 19.37 0.10 0.19
4 A1 110 110 0.01 9.12 0.40 0.57
5 A2 1040 1037 0.00 2.99 0.75 0.86
6 B1 3155 3147 1.34 49.81 0.75 0.86
7 B1 702 700 11.10 1.53 0.75 0.86
8 B2 1124 1121 123.08 0.14 0.75 0.86
9 B2 494 492 94.55 6.44 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 5760.5 cm-1
Scaled (by 0.9975) Zero Point Vibrational Energy (zpe) 5746.1 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 BLYP/6-311G*
ABC
0.74625 0.01887 0.01847

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 -0.903 0.000 1.666
H5 0.903 0.000 1.666

Atom - Atom Distances (Å)
  C1 I2 I3 H4 H5
C12.19852.19851.08871.0887
I22.19853.74872.72332.7233
I32.19853.74872.72332.7233
H41.08872.72332.72331.8061
H51.08872.72332.72331.8061

picture of Diiodomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
I2 C1 I3 116.980 I2 C1 H4 106.973
I2 C1 H5 106.973 I3 C1 H4 106.973
I3 C1 H5 106.973 H4 C1 H5 112.090
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 -0.729      
2 I 0.075      
3 I 0.075      
4 H 0.290      
5 H 0.290      


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 1.290 1.290
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -64.647 0.000 0.000
y 0.000 -63.961 0.000
z 0.000 0.000 -61.600
Traceless
 xyz
x -1.866 0.000 0.000
y 0.000 -0.838 0.000
z 0.000 0.000 2.704
Polar
3z2-r25.408
x2-y2-0.686
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.357 0.000 0.000
y 0.000 15.520 0.000
z 0.000 0.000 7.542


<r2> (average value of r2) Å2
<r2> 426.774
(<r2>)1/2 20.658