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 CH2CF2 (Ethene, 1,1-difluoro-)

using model chemistry: HF/CEP-31G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at HF/CEP-31G
 hartrees
Energy at 0K-59.733742
Energy at 298.15K-59.736310
Nuclear repulsion energy63.583519
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 HF/CEP-31G
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 3402 3067 3.03      
2 A1 1926 1736 276.17      
3 A1 1541 1389 0.98      
4 A1 941 849 93.36      
5 A1 531 479 10.81      
6 A2 788 711 0.00      
7 B1 1036 934 110.23      
8 B1 600 540 2.65      
9 B2 3511 3165 3.00      
10 B2 1382 1246 235.81      
11 B2 1036 934 20.65      
12 B2 439 396 1.47      

Unscaled Zero Point Vibrational Energy (zpe) 8567.2 cm-1
Scaled (by 0.9014) Zero Point Vibrational Energy (zpe) 7722.5 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 HF/CEP-31G
ABC
0.35003 0.33550 0.17131

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/CEP-31G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.414
C2 0.000 0.000 0.079
H3 0.000 0.933 1.948
H4 0.000 -0.933 1.948
F5 0.000 1.105 -0.705
F6 0.000 -1.105 -0.705

Atom - Atom Distances (Å)
  C1 C2 H3 H4 F5 F6
C11.33501.07531.07532.39032.3903
C21.33502.08912.08911.35531.3553
H31.07532.08911.86662.65923.3462
H41.07532.08911.86663.34622.6592
F52.39031.35532.65923.34622.2102
F62.39031.35533.34622.65922.2102

picture of Ethene, 1,1-difluoro- state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 F5 125.372 C1 C2 F6 125.372
C2 C1 H3 119.781 C2 C1 H4 119.781
H3 C1 H4 120.438 F5 C2 F6 109.257
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/CEP-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.322      
2 C 0.406      
3 H 0.195      
4 H 0.195      
5 F -0.237      
6 F -0.237      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.000 0.000 2.583 2.583
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -22.723 0.000 0.000
y 0.000 -24.007 0.000
z 0.000 0.000 -20.520
Traceless
 xyz
x -0.460 0.000 0.000
y 0.000 -2.386 0.000
z 0.000 0.000 2.845
Polar
3z2-r25.691
x2-y21.284
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.593 0.000 0.000
y 0.000 2.608 0.000
z 0.000 0.000 4.722


<r2> (average value of r2) Å2
<r2> 55.423
(<r2>)1/2 7.445