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All results from a given calculation for CH2I2 (Diiodomethane)

using model chemistry: B3LYP/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 B3LYP/6-311G**
 hartrees
Energy at 0K-13878.372002
Energy at 298.15K 
HF Energy-13878.372002
Nuclear repulsion energy605.728781
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/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 3139 3035 0.16 84.95 0.08 0.14
2 A1 1413 1367 0.04 21.62 0.50 0.66
3 A1 474 458 0.34 19.90 0.11 0.19
4 A1 116 112 0.02 7.05 0.41 0.58
5 A2 1068 1033 0.00 2.93 0.75 0.86
6 B1 3227 3119 3.18 49.33 0.75 0.86
7 B1 722 698 10.07 1.29 0.75 0.86
8 B2 1156 1117 120.68 0.68 0.75 0.86
9 B2 550 532 68.22 9.13 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 5932.5 cm-1
Scaled (by 0.9668) Zero Point Vibrational Energy (zpe) 5735.5 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/6-311G**
ABC
0.75585 0.01947 0.01905

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/6-311G**

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.050
I2 0.000 1.845 -0.091
I3 0.000 -1.845 -0.091
H4 -0.896 0.000 1.658
H5 0.896 0.000 1.658

Atom - Atom Distances (Å)
  C1 I2 I3 H4 H5
C12.16952.16951.08271.0827
I22.16953.69022.69532.6953
I32.16953.69022.69532.6953
H41.08272.69532.69531.7928
H51.08272.69532.69531.7928

picture of Diiodomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
I2 C1 I3 116.525 I2 C1 H4 107.158
I2 C1 H5 107.158 I3 C1 H4 107.158
I3 C1 H5 107.158 H4 C1 H5 111.774
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/6-311G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.536      
2 I 0.057      
3 I 0.057      
4 H 0.211      
5 H 0.211      


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 1.315 1.315
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -64.452 0.000 0.000
y 0.000 -63.902 0.000
z 0.000 0.000 -61.364
Traceless
 xyz
x -1.819 0.000 0.000
y 0.000 -0.994 0.000
z 0.000 0.000 2.813
Polar
3z2-r25.625
x2-y2-0.550
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.273 0.000 0.000
y 0.000 14.592 0.000
z 0.000 0.000 7.435


<r2> (average value of r2) Å2
<r2> 414.956
(<r2>)1/2 20.370