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All results from a given calculation for CH2I2 (Diiodomethane)

using model chemistry: HF/Def2TZVPP

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/Def2TZVPP
 hartrees
Energy at 0K-632.356557
Energy at 298.15K 
HF Energy-632.356557
Nuclear repulsion energy192.800533
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/Def2TZVPP
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 3290 2982 0.90 87.45 0.08 0.14
2 A1 1545 1400 0.43 23.66 0.45 0.62
3 A1 526 477 0.71 36.58 0.12 0.22
4 A1 128 116 0.02 4.72 0.37 0.54
5 A2 1165 1056 0.00 0.83 0.75 0.86
6 B1 3377 3061 3.51 45.89 0.75 0.86
7 B1 789 715 7.23 0.70 0.75 0.86
8 B2 1259 1141 137.91 8.00 0.75 0.86
9 B2 650 589 40.67 17.86 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 6363.9 cm-1
Scaled (by 0.9064) Zero Point Vibrational Energy (zpe) 5768.2 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/Def2TZVPP
ABC
0.76408 0.02051 0.02005

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/Def2TZVPP

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.045
I2 0.000 1.798 -0.090
I3 0.000 -1.798 -0.090
H4 -0.885 0.000 1.650
H5 0.885 0.000 1.650

Atom - Atom Distances (Å)
  C1 I2 I3 H4 H5
C12.12642.12641.07171.0717
I22.12643.59572.65412.6541
I32.12643.59572.65412.6541
H41.07172.65412.65411.7693
H51.07172.65412.65411.7693

picture of Diiodomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
I2 C1 I3 115.443 I2 C1 H4 107.545
I2 C1 H5 107.545 I3 C1 H4 107.545
I3 C1 H5 107.545 H4 C1 H5 111.267
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/Def2TZVPP Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.280      
2 I -0.023      
3 I -0.023      
4 H 0.163      
5 H 0.163      


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 1.352 1.352
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -61.484 0.000 0.000
y 0.000 -61.468 0.000
z 0.000 0.000 -58.352
Traceless
 xyz
x -1.574 0.000 0.000
y 0.000 -1.549 0.000
z 0.000 0.000 3.124
Polar
3z2-r26.248
x2-y2-0.017
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 7.719 0.000 0.000
y 0.000 15.169 0.000
z 0.000 0.000 8.762


<r2> (average value of r2) Å2
<r2> 213.332
(<r2>)1/2 14.606