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All results from a given calculation for CH2I2 (Diiodomethane)

using model chemistry: QCISD(T)=FULL/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 QCISD(T)=FULL/6-311G**
 hartrees
Energy at 0K-13874.214923
Energy at 298.15K 
HF Energy-13872.657163
Nuclear repulsion energy608.934699
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 QCISD(T)=FULL/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 3147 3147        
2 A1 1422 1422        
3 A1 480 480        
4 A1 119 119        
5 A2 1078 1078        
6 B1 3228 3228        
7 B1 727 727        
8 B2 1174 1174        
9 B2 578 578        

Unscaled Zero Point Vibrational Energy (zpe) 5976.2 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 5976.2 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 QCISD(T)=FULL/6-311G**
ABC
0.74718 0.01974 0.01930

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD(T)=FULL/6-311G**

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.056
I2 0.000 1.833 -0.091
I3 0.000 -1.833 -0.091
H4 -0.898 0.000 1.670
H5 0.898 0.000 1.670

Atom - Atom Distances (Å)
  C1 I2 I3 H4 H5
C12.16242.16241.08751.0875
I22.16243.66542.69562.6956
I32.16243.66542.69562.6956
H41.08752.69562.69561.7964
H51.08752.69562.69561.7964

picture of Diiodomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
I2 C1 I3 115.888 I2 C1 H4 107.413
I2 C1 H5 107.413 I3 C1 H4 107.413
I3 C1 H5 107.413 H4 C1 H5 111.358
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability