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All results from a given calculation for CH2I2 (Diiodomethane)

using model chemistry: CID/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 CID/6-311G*
 hartrees
Energy at 0K-13873.145679
Energy at 298.15K 
HF Energy-13872.654075
Nuclear repulsion energy614.365294
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 CID/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 3239 3009 0.68      
2 A1 1501 1394 0.00      
3 A1 511 475 0.35      
4 A1 126 117 0.03      
5 A2 1151 1070 0.00      
6 B1 3323 3087 2.83      
7 B1 770 716 10.47      
8 B2 1246 1158 112.77      
9 B2 630 585 31.15      

Unscaled Zero Point Vibrational Energy (zpe) 6248.5 cm-1
Scaled (by 0.9291) Zero Point Vibrational Energy (zpe) 5805.4 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 CID/6-311G*
ABC
0.76089 0.02009 0.01965

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.046
I2 0.000 1.817 -0.091
I3 0.000 -1.817 -0.091
H4 -0.888 0.000 1.660
H5 0.888 0.000 1.660

Atom - Atom Distances (Å)
  C1 I2 I3 H4 H5
C12.14262.14261.07921.0792
I22.14263.63302.67402.6740
I32.14263.63302.67402.6740
H41.07922.67402.67401.7753
H51.07922.67402.67401.7753

picture of Diiodomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
I2 C1 I3 115.946 I2 C1 H4 107.555
I2 C1 H5 107.555 I3 C1 H4 107.555
I3 C1 H5 107.555 H4 C1 H5 110.676
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability