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All results from a given calculation for CH2I2 (Diiodomethane)

using model chemistry: mPW1PW91/6-311G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at mPW1PW91/6-311G*
 hartrees
Energy at 0K-13879.218981
Energy at 298.15K 
HF Energy-13879.218981
Nuclear repulsion energy612.785184
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 mPW1PW91/6-311G*
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 3166 3021 0.40 78.89 0.08 0.15
2 A1 1436 1371 0.02 19.74 0.52 0.68
3 A1 496 473 0.31 18.51 0.10 0.19
4 A1 119 113 0.03 6.16 0.41 0.59
5 A2 1098 1048 0.00 3.55 0.75 0.86
6 B1 3254 3106 3.12 47.26 0.75 0.86
7 B1 736 702 11.49 1.44 0.75 0.86
8 B2 1180 1126 112.54 0.16 0.75 0.86
9 B2 590 563 57.30 8.25 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 6036.6 cm-1
Scaled (by 0.9544) Zero Point Vibrational Energy (zpe) 5761.3 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 mPW1PW91/6-311G*
ABC
0.76208 0.01997 0.01953

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/6-311G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.045
I2 0.000 1.822 -0.090
I3 0.000 -1.822 -0.090
H4 -0.893 0.000 1.657
H5 0.893 0.000 1.657

Atom - Atom Distances (Å)
  C1 I2 I3 H4 H5
C12.14652.14651.08271.0827
I22.14653.64392.67762.6776
I32.14653.64392.67762.6776
H41.08272.67762.67761.7859
H51.08272.67762.67761.7859

picture of Diiodomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
I2 C1 I3 116.159 I2 C1 H4 107.396
I2 C1 H5 107.396 I3 C1 H4 107.396
I3 C1 H5 107.396 H4 C1 H5 111.135
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/6-311G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.815      
2 I 0.086      
3 I 0.086      
4 H 0.321      
5 H 0.321      


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 1.352 1.352
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -64.019 0.000 0.000
y 0.000 -63.522 0.000
z 0.000 0.000 -60.862
Traceless
 xyz
x -1.827 0.000 0.000
y 0.000 -1.082 0.000
z 0.000 0.000 2.909
Polar
3z2-r25.817
x2-y2-0.497
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.212 0.000 0.000
y 0.000 14.050 0.000
z 0.000 0.000 7.331


<r2> (average value of r2) Å2
<r2> 405.583
(<r2>)1/2 20.139