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All results from a given calculation for CH2I2 (Diiodomethane)

using model chemistry: B1B95/6-311G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at B1B95/6-311G*
 hartrees
Energy at 0K-13879.895006
Energy at 298.15K 
HF Energy-13879.895006
Nuclear repulsion energy614.812420
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 B1B95/6-311G*
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 3168 3037 0.41 80.65 0.08 0.15
2 A1 1434 1375 0.01 19.30 0.53 0.69
3 A1 497 476 0.29 18.96 0.10 0.19
4 A1 118 113 0.03 6.01 0.42 0.59
5 A2 1095 1050 0.00 3.59 0.75 0.86
6 B1 3256 3121 2.95 48.68 0.75 0.86
7 B1 733 702 11.22 1.43 0.75 0.86
8 B2 1175 1126 111.47 0.12 0.75 0.86
9 B2 594 569 54.58 8.48 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 6034.0 cm-1
Scaled (by 0.9586) Zero Point Vibrational Energy (zpe) 5784.2 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 B1B95/6-311G*
ABC
0.76280 0.02012 0.01967

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/6-311G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.044
I2 0.000 1.815 -0.090
I3 0.000 -1.815 -0.090
H4 -0.892 0.000 1.656
H5 0.892 0.000 1.656

Atom - Atom Distances (Å)
  C1 I2 I3 H4 H5
C12.14062.14061.08131.0813
I22.14063.63052.67202.6720
I32.14063.63052.67202.6720
H41.08132.67202.67201.7831
H51.08132.67202.67201.7831

picture of Diiodomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
I2 C1 I3 115.988 I2 C1 H4 107.450
I2 C1 H5 107.450 I3 C1 H4 107.450
I3 C1 H5 107.450 H4 C1 H5 111.084
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/6-311G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.812      
2 I 0.088      
3 I 0.088      
4 H 0.319      
5 H 0.319      


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 1.323 1.323
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -63.951 0.000 0.000
y 0.000 -63.368 0.000
z 0.000 0.000 -60.809
Traceless
 xyz
x -1.862 0.000 0.000
y 0.000 -0.988 0.000
z 0.000 0.000 2.850
Polar
3z2-r25.700
x2-y2-0.583
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.223 0.000 0.000
y 0.000 14.007 0.000
z 0.000 0.000 7.348


<r2> (average value of r2) Å2
<r2> 402.934
(<r2>)1/2 20.073