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All results from a given calculation for CH2I2 (Diiodomethane)

using model chemistry: MP3/cc-pVTZ-PP

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at MP3/cc-pVTZ-PP
 hartrees
Energy at 0K-628.967983
Energy at 298.15K 
HF Energy-628.359692
Nuclear repulsion energy192.729925
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 MP3/cc-pVTZ-PP
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 3193 3193 0.05      
2 A1 1444 1444 0.10      
3 A1 514 514 0.11      
4 A1 122 122 0.02      
5 A2 1087 1087 0.00      
6 B1 3276 3276 3.89      
7 B1 739 739 6.63      
8 B2 1170 1170 90.55      
9 B2 637 637 24.11      

Unscaled Zero Point Vibrational Energy (zpe) 6090.9 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 6090.9 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 MP3/cc-pVTZ-PP
ABC
0.75929 0.02053 0.02006

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP3/cc-pVTZ-PP

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.048
I2 0.000 1.797 -0.091
I3 0.000 -1.797 -0.091
H4 -0.890 0.000 1.657
H5 0.890 0.000 1.657

Atom - Atom Distances (Å)
  C1 I2 I3 H4 H5
C12.12732.12731.07861.0786
I22.12733.59402.65992.6599
I32.12733.59402.65992.6599
H41.07862.65992.65991.7804
H51.07862.65992.65991.7804

picture of Diiodomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
I2 C1 I3 115.291 I2 C1 H4 107.588
I2 C1 H5 107.588 I3 C1 H4 107.588
I3 C1 H5 107.588 H4 C1 H5 111.246
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability