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All results from a given calculation for CH2I2 (Diiodomethane)

using model chemistry: HF/SDD

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at HF/SDD
 hartrees
Energy at 0K-61.349906
Energy at 298.15K 
HF Energy-61.349906
Nuclear repulsion energy39.273828
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 HF/SDD
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A1 3346 3013 10.10 149.92 0.07 0.12
2 A1 1564 1408 1.46 32.73 0.48 0.65
3 A1 501 451 0.87 55.84 0.12 0.21
4 A1 129 116 0.01 12.13 0.58 0.73
5 A2 1203 1083 0.00 14.79 0.75 0.86
6 B1 3451 3107 0.25 84.48 0.75 0.86
7 B1 812 731 18.10 10.98 0.75 0.86
8 B2 1305 1175 165.54 6.01 0.75 0.86
9 B2 612 551 71.44 34.65 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 6461.4 cm-1
Scaled (by 0.9004) Zero Point Vibrational Energy (zpe) 5817.8 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 HF/SDD
ABC
0.74343 0.01965 0.01922

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.063
I2 0.000 1.837 -0.092
I3 0.000 -1.837 -0.092
H4 -0.886 0.000 1.667
H5 0.886 0.000 1.667

Atom - Atom Distances (Å)
  C1 I2 I3 H4 H5
C12.16932.16931.07231.0723
I22.16933.67322.69262.6926
I32.16933.67322.69262.6926
H41.07232.69262.69261.7718
H51.07232.69262.69261.7718

picture of Diiodomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
I2 C1 I3 115.699 I2 C1 H4 107.447
I2 C1 H5 107.447 I3 C1 H4 107.447
I3 C1 H5 107.447 H4 C1 H5 111.415
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/SDD Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.956      
2 I 0.171      
3 I 0.171      
4 H 0.307      
5 H 0.307      


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 1.429 1.429
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -48.786 0.000 0.000
y 0.000 -49.260 0.000
z 0.000 0.000 -45.675
Traceless
 xyz
x -1.318 0.000 0.000
y 0.000 -2.029 0.000
z 0.000 0.000 3.348
Polar
3z2-r26.696
x2-y20.474
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.579 0.000 0.000
y 0.000 13.478 0.000
z 0.000 0.000 4.797


<r2> (average value of r2) Å2
<r2> 91.167
(<r2>)1/2 9.548