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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-13874.198452
Energy at 298.15K 
HF Energy-13872.653690
Nuclear repulsion energy608.746607
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 3128 3128        
2 A1 1442 1442        
3 A1 480 480        
4 A1 118 118        
5 A2 1093 1093        
6 B1 3212 3212        
7 B1 738 738        
8 B2 1186 1186        
9 B2 577 577        

Unscaled Zero Point Vibrational Energy (zpe) 5987.2 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 5987.2 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
0.74246 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 1.060
I2 0.000 1.833 -0.092
I3 0.000 -1.833 -0.092
H4 -0.898 0.000 1.674
H5 0.898 0.000 1.674

Atom - Atom Distances (Å)
  C1 I2 I3 H4 H5
C12.16462.16461.08781.0878
I22.16463.66522.69872.6987
I32.16463.66522.69872.6987
H41.08782.69872.69871.7958
H51.08782.69872.69871.7958

picture of Diiodomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
I2 C1 I3 115.697 I2 C1 H4 107.482
I2 C1 H5 107.482 I3 C1 H4 107.482
I3 C1 H5 107.482 H4 C1 H5 111.264
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability