return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

All results from a given calculation for HCCF (Fluoroacetylene)

using model chemistry: QCISD/STO-3G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C*V 1Σ
Energy calculated at QCISD/STO-3G
 hartrees
Energy at 0K-173.491461
Energy at 298.15K-173.490947
HF Energy-173.300414
Nuclear repulsion energy53.651334
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/STO-3G
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 Σ 3661 3661 98.40      
2 Σ 2427 2427 2.43      
3 Σ 1032 1032 6.53      
4 Π 678 678 12.45      
4 Π 678 678 12.45      
5 Π 358 358 1.69      
5 Π 358 358 1.69      

Unscaled Zero Point Vibrational Energy (zpe) 4595.6 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 4595.6 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/STO-3G
B
0.30200

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

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -0.117
C2 0.000 0.000 -1.329
F3 0.000 0.000 1.233
H4 0.000 0.000 -2.414

Atom - Atom Distances (Å)
  C1 C2 F3 H4
C11.21191.35032.2965
C21.21192.56211.0847
F31.35032.56213.6468
H42.29651.08473.6468

picture of Fluoroacetylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H4 180.000 C2 C1 F3 180.000
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability