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All results from a given calculation for CH2I2 (Diiodomethane)

using model chemistry: CCSD=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 CCSD=FULL/6-311G*
 hartrees
Energy at 0K-13874.178457
Energy at 298.15K 
HF Energy-13872.653867
Nuclear repulsion energy610.505487
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 CCSD=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 3152 3152 0.92      
2 A1 1459 1459 0.00      
3 A1 491 491 0.22      
4 A1 121 121 0.02      
5 A2 1112 1112 0.00      
6 B1 3233 3233 1.94      
7 B1 749 749 10.40      
8 B2 1206 1206 103.30      
9 B2 597 597 30.31      

Unscaled Zero Point Vibrational Energy (zpe) 6059.7 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 6059.7 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 CCSD=FULL/6-311G*
ABC
0.74929 0.01985 0.01941

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD=FULL/6-311G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.054
I2 0.000 1.828 -0.091
I3 0.000 -1.828 -0.091
H4 -0.894 0.000 1.671
H5 0.894 0.000 1.671

Atom - Atom Distances (Å)
  C1 I2 I3 H4 H5
C12.15702.15701.08611.0861
I22.15703.65542.69152.6915
I32.15703.65542.69152.6915
H41.08612.69152.69151.7886
H51.08612.69152.69151.7886

picture of Diiodomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
I2 C1 I3 115.844 I2 C1 H4 107.539
I2 C1 H5 107.539 I3 C1 H4 107.539
I3 C1 H5 107.539 H4 C1 H5 110.857
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability