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All results from a given calculation for CH2I2 (Diiodomethane)

using model chemistry: B2PLYP=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 B2PLYP=FULL/3-21G
 hartrees
Energy at 0K-13818.683637
Energy at 298.15K 
HF Energy-13818.623422
Nuclear repulsion energy597.851283
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 B2PLYP=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 3181 3028 1.53 93.95 0.10 0.17
2 A1 1497 1425 0.08 31.76 0.66 0.79
3 A1 471 449 0.65 18.94 0.17 0.28
4 A1 118 113 0.01 8.87 0.50 0.67
5 A2 1116 1062 0.00 18.06 0.75 0.86
6 B1 3266 3109 0.52 62.06 0.75 0.86
7 B1 748 712 13.09 5.24 0.75 0.86
8 B2 1207 1149 116.23 0.10 0.75 0.86
9 B2 585 557 59.46 16.72 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 6094.0 cm-1
Scaled (by 0.952) Zero Point Vibrational Energy (zpe) 5801.5 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 B2PLYP=FULL/3-21G
ABC
0.73545 0.01897 0.01856

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP=FULL/3-21G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.067
I2 0.000 1.870 -0.092
I3 0.000 -1.870 -0.092
H4 -0.895 0.000 1.679
H5 0.895 0.000 1.679

Atom - Atom Distances (Å)
  C1 I2 I3 H4 H5
C12.19982.19981.08411.0841
I22.19983.73902.72612.7261
I32.19983.73902.72612.7261
H41.08412.72612.72611.7906
H51.08412.72612.72611.7906

picture of Diiodomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
I2 C1 I3 116.393 I2 C1 H4 107.287
I2 C1 H5 107.287 I3 C1 H4 107.287
I3 C1 H5 107.287 H4 C1 H5 111.353
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability