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All results from a given calculation for CH2I2 (Diiodomethane)

using model chemistry: LSDA/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 LSDA/cc-pVTZ-PP
 hartrees
Energy at 0K-630.708008
Energy at 298.15K 
HF Energy-630.708008
Nuclear repulsion energy193.441188
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/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 3061 3061 0.83 87.82 0.05 0.10
2 A1 1335 1335 0.25 17.86 0.51 0.67
3 A1 505 505 0.05 16.37 0.07 0.13
4 A1 115 115 0.01 5.78 0.35 0.52
5 A2 1005 1005 0.00 1.30 0.75 0.86
6 B1 3151 3151 9.35 42.18 0.75 0.86
7 B1 698 698 7.69 0.80 0.75 0.86
8 B2 1076 1076 70.04 0.07 0.75 0.86
9 B2 595 595 58.54 3.63 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 5769.1 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 5769.1 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 LSDA/cc-pVTZ-PP
ABC
0.76109 0.02073 0.02026

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.044
I2 0.000 1.788 -0.090
I3 0.000 -1.788 -0.090
H4 -0.904 0.000 1.656
H5 0.904 0.000 1.656

Atom - Atom Distances (Å)
  C1 I2 I3 H4 H5
C12.11802.11801.09151.0915
I22.11803.57682.65792.6579
I32.11803.57682.65792.6579
H41.09152.65792.65791.8088
H51.09152.65792.65791.8088

picture of Diiodomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
I2 C1 I3 115.207 I2 C1 H4 107.456
I2 C1 H5 107.456 I3 C1 H4 107.456
I3 C1 H5 107.456 H4 C1 H5 111.906
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at LSDA/cc-pVTZ-PP Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.363      
2 I 0.011      
3 I 0.011      
4 H 0.171      
5 H 0.171      


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 1.152 1.152
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -60.981 0.000 0.000
y 0.000 -60.342 0.000
z 0.000 0.000 -58.055
Traceless
 xyz
x -1.783 0.000 0.000
y 0.000 -0.824 0.000
z 0.000 0.000 2.607
Polar
3z2-r25.214
x2-y2-0.639
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 8.057 0.000 0.000
y 0.000 15.509 0.000
z 0.000 0.000 8.905


<r2> (average value of r2) Å2
<r2> 211.332
(<r2>)1/2 14.537