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: B3LYP/cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2H 1Ag
Energy calculated at B3LYP/cc-pVTZ
 hartrees
Energy at 0K-277.161450
Energy at 298.15K-277.163741
HF Energy-277.161450
Nuclear repulsion energy111.079640
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 B3LYP/cc-pVTZ
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 3219 3112 0.00      
2 Ag 1752 1693 0.00      
3 Ag 1314 1270 0.00      
4 Ag 1153 1114 0.00      
5 Ag 557 538 0.00      
6 Au 914 883 70.63      
7 Au 339 328 4.51      
8 Bg 833 805 0.00      
9 Bu 3213 3106 13.31      
10 Bu 1298 1255 15.82      
11 Bu 1172 1133 302.67      
12 Bu 319 309 12.01      

Unscaled Zero Point Vibrational Energy (zpe) 8041.2 cm-1
Scaled (by 0.9666) Zero Point Vibrational Energy (zpe) 7772.7 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 B3LYP/cc-pVTZ
ABC
1.93537 0.13392 0.12525

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/cc-pVTZ

Point Group is C2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.331 0.571 0.000
C2 0.331 -0.571 0.000
F3 0.331 1.740 0.000
F4 -0.331 -1.740 0.000
H5 -1.407 0.664 0.000
H6 1.407 -0.664 0.000

Atom - Atom Distances (Å)
  C1 C2 F3 F4 H5 H6
C11.31991.34412.31121.08002.1325
C21.31992.31121.34412.13251.0800
F31.34412.31123.54322.04452.6345
F42.31121.34413.54322.63452.0445
H51.08002.13252.04452.63453.1122
H62.13251.08002.63452.04453.1122

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 120.348 C1 C2 H6 125.092
C2 C1 F3 120.348 C2 C1 H5 125.092
F3 C1 H5 114.560 F4 C2 H6 114.560
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.076      
2 C 0.076      
3 F -0.182      
4 F -0.182      
5 H 0.106      
6 H 0.106      


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 -19.080 -2.371 0.000
y -2.371 -25.548 0.000
z 0.000 0.000 -22.425
Traceless
 xyz
x 4.907 -2.371 0.000
y -2.371 -4.795 0.000
z 0.000 0.000 -0.111
Polar
3z2-r2-0.223
x2-y26.468
xy-2.371
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.696 -0.487 0.000
y -0.487 4.880 0.000
z 0.000 0.000 2.369


<r2> (average value of r2) Å2
<r2> 80.524
(<r2>)1/2 8.974