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All results from a given calculation for HCCF (Fluoroacetylene)

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 C*V 1Σ
Energy calculated at QCISD/3-21G*
 hartrees
Energy at 0K-175.005693
Energy at 298.15K 
HF Energy-174.689849
Nuclear repulsion energy54.347959
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 Σ 3476 3341 59.75      
2 Σ 2309 2219 32.89      
3 Σ 1055 1014 38.04      
4 Π 663 637 55.78      
4 Π 663 637 55.78      
5 Π 412 396 1.55      
5 Π 412 396 1.55      

Unscaled Zero Point Vibrational Energy (zpe) 4495.1 cm-1
Scaled (by 0.9611) Zero Point Vibrational Energy (zpe) 4320.2 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*
B
0.30979

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

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -0.109
C2 0.000 0.000 -1.317
F3 0.000 0.000 1.215
H4 0.000 0.000 -2.382

Atom - Atom Distances (Å)
  C1 C2 F3 H4
C11.20781.32382.2729
C21.20782.53161.0650
F31.32382.53163.5967
H42.27291.06503.5967

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