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All results from a given calculation for CH2I2 (Diiodomethane)

using model chemistry: LSDA/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 LSDA/6-311G*
 hartrees
Energy at 0K-13868.668454
Energy at 298.15K 
HF Energy-13868.668454
Nuclear repulsion energy617.021046
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 LSDA/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 3067 3017 0.27 80.50 0.08 0.15
2 A1 1362 1340 1.03 21.08 0.53 0.69
3 A1 497 489 0.08 15.59 0.10 0.18
4 A1 116 114 0.02 7.14 0.41 0.58
5 A2 1049 1032 0.00 3.74 0.75 0.86
6 B1 3153 3101 7.43 47.64 0.75 0.86
7 B1 710 698 13.20 1.33 0.75 0.86
8 B2 1123 1105 82.58 0.25 0.75 0.86
9 B2 580 570 70.48 4.22 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 5828.0 cm-1
Scaled (by 0.9837) Zero Point Vibrational Energy (zpe) 5733.0 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 LSDA/6-311G*
ABC
0.76551 0.02028 0.01983

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.039
I2 0.000 1.808 -0.090
I3 0.000 -1.808 -0.090
H4 -0.901 0.000 1.658
H5 0.901 0.000 1.658

Atom - Atom Distances (Å)
  C1 I2 I3 H4 H5
C12.13192.13191.09311.0931
I22.13193.61612.67172.6717
I32.13193.61612.67172.6717
H41.09312.67172.67171.8021
H51.09312.67172.67171.8021

picture of Diiodomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
I2 C1 I3 116.009 I2 C1 H4 107.457
I2 C1 H5 107.457 I3 C1 H4 107.457
I3 C1 H5 107.457 H4 C1 H5 111.033
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at LSDA/6-311G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.871      
2 I 0.100      
3 I 0.100      
4 H 0.336      
5 H 0.336      


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 1.341 1.341
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -64.081 0.000 0.000
y 0.000 -63.550 0.000
z 0.000 0.000 -60.930
Traceless
 xyz
x -1.840 0.000 0.000
y 0.000 -1.045 0.000
z 0.000 0.000 2.885
Polar
3z2-r25.770
x2-y2-0.530
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.263 0.000 0.000
y 0.000 14.290 0.000
z 0.000 0.000 7.378


<r2> (average value of r2) Å2
<r2> 400.250
(<r2>)1/2 20.006