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All results from a given calculation for CH2I2 (Diiodomethane)

using model chemistry: CISD/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 CISD/6-311G**
 hartrees
Energy at 0K-13873.161140
Energy at 298.15K 
HF Energy-13872.657479
Nuclear repulsion energy614.646819
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 CISD/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 3242 3242 0.73      
2 A1 1481 1481 0.18      
3 A1 511 511 0.31      
4 A1 126 126 0.03      
5 A2 1135 1135 0.00      
6 B1 3324 3324 2.42      
7 B1 760 760 8.83      
8 B2 1232 1232 121.34      
9 B2 630 630 30.59      

Unscaled Zero Point Vibrational Energy (zpe) 6220.5 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 6220.5 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 CISD/6-311G**
ABC
0.76359 0.02010 0.01966

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.044
I2 0.000 1.816 -0.090
I3 0.000 -1.816 -0.090
H4 -0.889 0.000 1.656
H5 0.889 0.000 1.656

Atom - Atom Distances (Å)
  C1 I2 I3 H4 H5
C12.14092.14091.07931.0793
I22.14093.63192.67172.6717
I32.14093.63192.67172.6717
H41.07932.67172.67171.7771
H51.07932.67172.67171.7771

picture of Diiodomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
I2 C1 I3 116.034 I2 C1 H4 107.499
I2 C1 H5 107.499 I3 C1 H4 107.499
I3 C1 H5 107.499 H4 C1 H5 110.821
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability