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All results from a given calculation for CH2I2 (Diiodomethane)

using model chemistry: CID/3-21G

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/3-21G
 hartrees
Energy at 0K-13814.651896
Energy at 298.15K 
HF Energy-13814.487644
Nuclear repulsion energy598.739985
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/3-21G
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 3191 2973 2.74      
2 A1 1520 1416 0.18      
3 A1 481 448 0.49      
4 A1 121 113 0.00      
5 A2 1137 1060 0.00      
6 B1 3268 3045 0.11      
7 B1 761 709 11.89      
8 B2 1233 1149 101.89      
9 B2 614 572 32.74      

Unscaled Zero Point Vibrational Energy (zpe) 6163.6 cm-1
Scaled (by 0.9316) Zero Point Vibrational Energy (zpe) 5742.0 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/3-21G
ABC
0.73574 0.01903 0.01862

See section I.F.4 to change rotational constant units
Geometric Data calculated at CID/3-21G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.066
I2 0.000 1.866 -0.092
I3 0.000 -1.866 -0.092
H4 -0.893 0.000 1.683
H5 0.893 0.000 1.683

Atom - Atom Distances (Å)
  C1 I2 I3 H4 H5
C12.19652.19651.08551.0855
I22.19653.73282.72612.7261
I32.19653.73282.72612.7261
H41.08552.72612.72611.7865
H51.08552.72612.72611.7865

picture of Diiodomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
I2 C1 I3 116.361 I2 C1 H4 107.434
I2 C1 H5 107.434 I3 C1 H4 107.434
I3 C1 H5 107.434 H4 C1 H5 110.745
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability