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All results from a given calculation for CH2I2 (Diiodomethane)

using model chemistry: MP4=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 MP4=FULL/3-21G
 hartrees
Energy at 0K-13814.692347
Energy at 298.15K 
HF Energy-13814.487004
Nuclear repulsion energy594.951818
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 MP4=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 3130 3064        
2 A1 1490 1459        
3 A1 459 449        
4 A1 117 114        
5 A2 1105 1082        
6 B1 3212 3144        
7 B1 742 726        
8 B2 1197 1172        
9 B2 581 569        

Unscaled Zero Point Vibrational Energy (zpe) 6016.5 cm-1
Scaled (by 0.9788) Zero Point Vibrational Energy (zpe) 5888.9 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 MP4=FULL/3-21G
ABC
0.72343 0.01880 0.01839

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP4=FULL/3-21G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.076
I2 0.000 1.878 -0.093
I3 0.000 -1.878 -0.093
H4 -0.899 0.000 1.692
H5 0.899 0.000 1.692

Atom - Atom Distances (Å)
  C1 I2 I3 H4 H5
C12.21222.21221.09001.0900
I22.21223.75572.74262.7426
I32.21223.75572.74262.7426
H41.09002.74262.74261.7989
H51.09002.74262.74261.7989

picture of Diiodomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
I2 C1 I3 116.178 I2 C1 H4 107.375
I2 C1 H5 107.375 I3 C1 H4 107.375
I3 C1 H5 107.375 H4 C1 H5 111.206
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability