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 C2H2F2 (Ethene, 1,2-difluoro-, (E)-)

using model chemistry: BLYP/STO-3G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2H 1Ag
Energy calculated at BLYP/STO-3G
 hartrees
Energy at 0K-273.101334
Energy at 298.15K-273.103257
HF Energy-273.101334
Nuclear repulsion energy107.059073
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 BLYP/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 Ag 3249 3006 0.00      
2 Ag 1742 1612 0.00      
3 Ag 1323 1224 0.00      
4 Ag 1180 1092 0.00      
5 Ag 532 492 0.00      
6 Au 914 845 28.65      
7 Au 297 275 0.09      
8 Bg 688 636 0.00      
9 Bu 3242 2999 16.84      
10 Bu 1363 1261 34.24      
11 Bu 1228 1136 51.11      
12 Bu 297 275 1.79      

Unscaled Zero Point Vibrational Energy (zpe) 8026.0 cm-1
Scaled (by 0.9252) Zero Point Vibrational Energy (zpe) 7425.7 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 BLYP/STO-3G
ABC
1.87271 0.12284 0.11528

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

Point Group is C2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.333 0.604 0.000
C2 0.333 -0.604 0.000
F3 0.333 1.818 0.000
F4 -0.333 -1.818 0.000
H5 -1.448 0.662 0.000
H6 1.448 -0.662 0.000

Atom - Atom Distances (Å)
  C1 C2 F3 F4 H5 H6
C11.37851.38432.42111.11662.1846
C21.37852.42111.38432.18461.1166
F31.38432.42113.69542.12242.7189
F42.42111.38433.69542.71892.1224
H51.11662.18462.12242.71893.1841
H62.18461.11662.71892.12243.1841

picture of Ethene, 1,2-difluoro-, (E)- state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 F4 122.402 C1 C2 H6 121.874
C2 C1 F3 122.402 C2 C1 H5 121.874
F3 C1 H5 115.724 F4 C2 H6 115.724
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at BLYP/STO-3G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.033      
2 C -0.033      
3 F -0.039      
4 F -0.039      
5 H 0.072      
6 H 0.072      


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 0.000 0.000
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -17.856 -0.777 0.000
y -0.777 -20.133 0.000
z 0.000 0.000 -19.700
Traceless
 xyz
x 2.061 -0.777 0.000
y -0.777 -1.355 0.000
z 0.000 0.000 -0.705
Polar
3z2-r2-1.411
x2-y22.277
xy-0.777
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.020 -0.199 0.000
y -0.199 3.589 0.000
z 0.000 0.000 0.441


<r2> (average value of r2) Å2
<r2> 84.234
(<r2>)1/2 9.178