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All results from a given calculation for CH2I2 (Diiodomethane)

using model chemistry: MP3=FULL/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 MP3=FULL/3-21G*
 hartrees
Energy at 0K-13814.999984
Energy at 298.15K 
HF Energy-13814.622081
Nuclear repulsion energy604.848835
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/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 3178 3178 0.07      
2 A1 1505 1505 0.08      
3 A1 498 498 0.88      
4 A1 118 118 0.01      
5 A2 1113 1113 0.00      
6 B1 3263 3263 3.33      
7 B1 755 755 8.81      
8 B2 1209 1209 96.55      
9 B2 608 608 34.98      

Unscaled Zero Point Vibrational Energy (zpe) 6122.7 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 6122.7 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/3-21G*
ABC
0.70335 0.01959 0.01913

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP3=FULL/3-21G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.097
I2 0.000 1.840 -0.094
I3 0.000 -1.840 -0.094
H4 -0.902 0.000 1.702
H5 0.902 0.000 1.702

Atom - Atom Distances (Å)
  C1 I2 I3 H4 H5
C12.19162.19161.08641.0864
I22.19163.67962.72502.7250
I32.19163.67962.72502.7250
H41.08642.72502.72501.8040
H51.08642.72502.72501.8040

picture of Diiodomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
I2 C1 I3 114.168 I2 C1 H4 107.632
I2 C1 H5 107.632 I3 C1 H4 107.632
I3 C1 H5 107.632 H4 C1 H5 112.248
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability