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All results from a given calculation for CF2I2 (difluorodiiodomethane)

using model chemistry: QCISD/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 QCISD/3-21G*
 hartrees
Energy at 0K-14011.823848
Energy at 298.15K 
HF Energy-14011.240078
Nuclear repulsion energy957.939753
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 QCISD/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 1078 1036 191.75      
2 A1 557 536 8.85      
3 A1 270 259 0.04      
4 A1 111 107 0.07      
5 A2 235 226 0.00      
6 B1 738 709 309.17      
7 B1 268 257 1.23      
8 B2 1182 1136 75.94      
9 B2 285 274 0.09      

Unscaled Zero Point Vibrational Energy (zpe) 2361.8 cm-1
Scaled (by 0.9611) Zero Point Vibrational Energy (zpe) 2269.9 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 QCISD/3-21G*
ABC
0.08737 0.01853 0.01673

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.876
F2 0.000 1.121 1.684
F3 0.000 -1.121 1.684
I4 1.843 0.000 -0.336
I5 -1.843 0.000 -0.336

Atom - Atom Distances (Å)
  C1 F2 F3 I4 I5
C11.38161.38162.20602.2060
F21.38162.24182.95522.9552
F31.38162.24182.95522.9552
I42.20602.95522.95523.6863
I52.20602.95522.95523.6863

picture of difluorodiiodomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
F2 C1 F3 108.445 F2 C1 I4 108.737
F2 C1 I5 108.737 F3 C1 I4 108.737
F3 C1 I5 108.737 I4 C1 I5 113.341
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability