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All results from a given calculation for CH2I2 (Diiodomethane)

using model chemistry: BLYP/STO-3G

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/STO-3G
 hartrees
Energy at 0K-13744.214654
Energy at 298.15K 
HF Energy-13744.214654
Nuclear repulsion energy598.733713
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/STO-3G
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 3243 3000 0.42 46.47 0.10 0.19
2 A1 1573 1456 0.19 20.18 0.69 0.82
3 A1 512 474 4.60 13.41 0.14 0.24
4 A1 128 118 0.28 6.67 0.49 0.66
5 A2 1183 1094 0.00 13.60 0.75 0.86
6 B1 3365 3113 0.84 34.97 0.75 0.86
7 B1 773 715 0.78 2.56 0.75 0.86
8 B2 1255 1161 87.59 1.92 0.75 0.86
9 B2 639 591 78.43 7.80 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 6334.8 cm-1
Scaled (by 0.9252) Zero Point Vibrational Energy (zpe) 5860.9 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 BLYP/STO-3G
ABC
0.78113 0.01891 0.01853

See section I.F.4 to change rotational constant units
Geometric Data calculated at BLYP/STO-3G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.020
I2 0.000 1.873 -0.089
I3 0.000 -1.873 -0.089
H4 -0.899 0.000 1.670
H5 0.899 0.000 1.670

Atom - Atom Distances (Å)
  C1 I2 I3 H4 H5
C12.17682.17681.10901.1090
I22.17683.74532.72192.7219
I32.17683.74532.72192.7219
H41.10902.72192.72191.7984
H51.10902.72192.72191.7984

picture of Diiodomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
I2 C1 I3 118.698 I2 C1 H4 107.360
I2 C1 H5 107.360 I3 C1 H4 107.360
I3 C1 H5 107.360 H4 C1 H5 108.355
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at BLYP/STO-3G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.296      
2 I 0.042      
3 I 0.042      
4 H 0.106      
5 H 0.106      


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 1.380 1.380
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -59.065 0.000 0.000
y 0.000 -61.626 0.000
z 0.000 0.000 -57.343
Traceless
 xyz
x 0.420 0.000 0.000
y 0.000 -3.422 0.000
z 0.000 0.000 3.002
Polar
3z2-r26.005
x2-y22.561
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.148 0.000 0.000
y 0.000 7.778 0.000
z 0.000 0.000 2.329


<r2> (average value of r2) Å2
<r2> 423.076
(<r2>)1/2 20.569