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All results from a given calculation for CF2I2 (difluorodiiodomethane)

using model chemistry: CISD/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 CISD/3-21G*
 hartrees
Energy at 0K-14011.733698
Energy at 298.15K 
HF Energy-14011.241435
Nuclear repulsion energy965.518806
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 CISD/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 1123 1050 210.82      
2 A1 579 541 8.71      
3 A1 283 264 0.17      
4 A1 116 108 0.09      
5 A2 247 230 0.00      
6 B1 783 732 328.62      
7 B1 281 262 2.21      
8 B2 1224 1144 82.40      
9 B2 297 277 0.06      

Unscaled Zero Point Vibrational Energy (zpe) 2465.9 cm-1
Scaled (by 0.9344) Zero Point Vibrational Energy (zpe) 2304.1 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 CISD/3-21G*
ABC
0.08919 0.01878 0.01698

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.861
F2 0.000 1.110 1.668
F3 0.000 -1.110 1.668
I4 1.831 0.000 -0.332
I5 -1.831 0.000 -0.332

Atom - Atom Distances (Å)
  C1 F2 F3 I4 I5
C11.37211.37212.18552.1855
F21.37212.22032.92982.9298
F31.37212.22032.92982.9298
I42.18552.92982.92983.6618
I52.18552.92982.92983.6618

picture of difluorodiiodomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
F2 C1 F3 108.011 F2 C1 I4 108.718
F2 C1 I5 108.718 F3 C1 I4 108.718
F3 C1 I5 108.718 I4 C1 I5 113.810
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability