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All results from a given calculation for CH2I2 (Diiodomethane)

using model chemistry: CCSD=FULL/Def2TZVPP

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/Def2TZVPP
 hartrees
Energy at 0K-633.664542
Energy at 298.15K 
HF Energy-632.356395
Nuclear repulsion energy193.928216
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/Def2TZVPP
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 3167 3167 0.23      
2 A1 1438 1438 0.14      
3 A1 513 513 0.08      
4 A1 122 122 0.01      
5 A2 1083 1083 0.00      
6 B1 3252 3252 3.33      
7 B1 734 734 7.01      
8 B2 1162 1162 91.98      
9 B2 635 635 25.30      

Unscaled Zero Point Vibrational Energy (zpe) 6053.0 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 6053.0 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 CCSD=FULL/Def2TZVPP
ABC
0.76438 0.02082 0.02034

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD=FULL/Def2TZVPP

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.044
I2 0.000 1.784 -0.090
I3 0.000 -1.784 -0.090
H4 -0.889 0.000 1.652
H5 0.889 0.000 1.652

Atom - Atom Distances (Å)
  C1 I2 I3 H4 H5
C12.11432.11431.07771.0777
I22.11433.56892.64802.6480
I32.11433.56892.64802.6480
H41.07772.64802.64801.7789
H51.07772.64802.64801.7789

picture of Diiodomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
I2 C1 I3 115.127 I2 C1 H4 107.630
I2 C1 H5 107.630 I3 C1 H4 107.630
I3 C1 H5 107.630 H4 C1 H5 111.242
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability