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All results from a given calculation for CH2I2 (Diiodomethane)

using model chemistry: MP3=FULL/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=FULL/cc-pVTZ-PP
 hartrees
Energy at 0K-629.034808
Energy at 298.15K 
HF Energy-628.359708
Nuclear repulsion energy193.102163
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=FULL/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 3217 3217 0.02      
2 A1 1457 1457 0.05      
3 A1 515 515 0.08      
4 A1 122 122 0.02      
5 A2 1091 1091 0.00      
6 B1 3275 3275 4.25      
7 B1 739 739 6.78      
8 B2 1172 1172 87.74      
9 B2 639 639 22.86      

Unscaled Zero Point Vibrational Energy (zpe) 6113.2 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 6113.2 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 MP3=FULL/cc-pVTZ-PP
ABC
0.76334 0.02060 0.02013

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.045
I2 0.000 1.794 -0.090
I3 0.000 -1.794 -0.090
H4 -0.886 0.000 1.652
H5 0.886 0.000 1.652

Atom - Atom Distances (Å)
  C1 I2 I3 H4 H5
C12.12332.12331.07391.0739
I22.12333.58802.65302.6530
I32.12333.58802.65302.6530
H41.07392.65302.65301.7729
H51.07392.65302.65301.7729

picture of Diiodomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
I2 C1 I3 115.322 I2 C1 H4 107.573
I2 C1 H5 107.573 I3 C1 H4 107.573
I3 C1 H5 107.573 H4 C1 H5 111.276
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability