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All results from a given calculation for CH2I2 (Diiodomethane)

using model chemistry: PBEPBEultrafine/cc-pVTZ-PP

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at PBEPBEultrafine/cc-pVTZ-PP
 hartrees
Energy at 0K-630.661864
Energy at 298.15K 
HF Energy-630.661864
Nuclear repulsion energy190.145068
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 PBEPBEultrafine/cc-pVTZ-PP
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 3066 0.00 85.31 0.05 0.10
2 A1 1355 1355 0.09 18.50 0.49 0.66
3 A1 478 478 0.13 17.71 0.07 0.13
4 A1 111 111 0.01 6.53 0.34 0.51
5 A2 1011 1011 0.00 1.04 0.75 0.86
6 B1 3154 3154 4.25 41.78 0.75 0.86
7 B1 698 698 7.08 0.85 0.75 0.86
8 B2 1087 1087 90.39 0.34 0.75 0.86
9 B2 554 554 68.53 4.27 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 5756.1 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 5756.1 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 PBEPBEultrafine/cc-pVTZ-PP
ABC
0.75203 0.01990 0.01947

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBEultrafine/cc-pVTZ-PP

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.053
I2 0.000 1.825 -0.091
I3 0.000 -1.825 -0.091
H4 -0.905 0.000 1.660
H5 0.905 0.000 1.660

Atom - Atom Distances (Å)
  C1 I2 I3 H4 H5
C12.15382.15381.08981.0898
I22.15383.64992.68602.6860
I32.15383.64992.68602.6860
H41.08982.68602.68601.8104
H51.08982.68602.68601.8104

picture of Diiodomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
I2 C1 I3 115.846 I2 C1 H4 107.202
I2 C1 H5 107.202 I3 C1 H4 107.202
I3 C1 H5 107.202 H4 C1 H5 112.318
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBEultrafine/cc-pVTZ-PP Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.313      
2 I 0.011      
3 I 0.011      
4 H 0.146      
5 H 0.146      


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 1.123 1.123
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -61.170 0.000 0.000
y 0.000 -60.422 0.000
z 0.000 0.000 -58.266
Traceless
 xyz
x -1.826 0.000 0.000
y 0.000 -0.704 0.000
z 0.000 0.000 2.530
Polar
3z2-r25.060
x2-y2-0.748
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 8.221 0.000 0.000
y 0.000 16.160 0.000
z 0.000 0.000 9.092


<r2> (average value of r2) Å2
<r2> 218.181
(<r2>)1/2 14.771