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All results from a given calculation for CH2I2 (Diiodomethane)

using model chemistry: B3LYP/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 B3LYP/STO-3G
 hartrees
Energy at 0K-13744.517622
Energy at 298.15K 
HF Energy-13744.517622
Nuclear repulsion energy605.564648
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 B3LYP/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 3349 2989 0.02 44.73 0.10 0.19
2 A1 1623 1448 0.04 20.11 0.69 0.82
3 A1 539 481 5.31 13.91 0.14 0.24
4 A1 134 119 0.33 5.53 0.51 0.67
5 A2 1226 1094 0.00 14.76 0.75 0.86
6 B1 3472 3098 0.10 34.67 0.75 0.86
7 B1 799 713 0.65 2.38 0.75 0.86
8 B2 1302 1162 89.37 1.17 0.75 0.86
9 B2 692 617 64.96 9.79 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 6567.1 cm-1
Scaled (by 0.8924) Zero Point Vibrational Energy (zpe) 5860.5 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 B3LYP/STO-3G
ABC
0.79054 0.01937 0.01897

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/STO-3G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.014
I2 0.000 1.850 -0.089
I3 0.000 -1.850 -0.089
H4 -0.891 0.000 1.661
H5 0.891 0.000 1.661

Atom - Atom Distances (Å)
  C1 I2 I3 H4 H5
C12.15412.15411.10101.1010
I22.15413.70062.69812.6981
I32.15413.70062.69812.6981
H41.10102.69812.69811.7816
H51.10102.69812.69811.7816

picture of Diiodomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
I2 C1 I3 118.398 I2 C1 H4 107.514
I2 C1 H5 107.514 I3 C1 H4 107.514
I3 C1 H5 107.514 H4 C1 H5 108.012
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/STO-3G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.308      
2 I 0.045      
3 I 0.045      
4 H 0.110      
5 H 0.110      


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 1.445 1.445
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -59.045 0.000 0.000
y 0.000 -62.027 0.000
z 0.000 0.000 -57.343
Traceless
 xyz
x 0.639 0.000 0.000
y 0.000 -3.833 0.000
z 0.000 0.000 3.194
Polar
3z2-r26.387
x2-y22.982
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.136 0.000 0.000
y 0.000 7.257 0.000
z 0.000 0.000 2.291


<r2> (average value of r2) Å2
<r2> 414.158
(<r2>)1/2 20.351