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/SDD

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/SDD
 hartrees
Energy at 0K-277.053999
Energy at 298.15K-277.056182
HF Energy-277.053999
Nuclear repulsion energy108.168132
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/SDD
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 3286 3159 0.00      
2 Ag 1730 1663 0.00      
3 Ag 1312 1261 0.00      
4 Ag 1069 1027 0.00      
5 Ag 522 502 0.00      
6 Au 944 907 112.24      
7 Au 317 305 8.94      
8 Bg 829 797 0.00      
9 Bu 3278 3151 16.14      
10 Bu 1278 1229 1.35      
11 Bu 1099 1057 235.17      
12 Bu 301 290 17.18      

Unscaled Zero Point Vibrational Energy (zpe) 7982.4 cm-1
Scaled (by 0.9613) Zero Point Vibrational Energy (zpe) 7673.5 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 B3LYP/SDD
ABC
1.85006 0.12696 0.11881

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

Point Group is C2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.344 0.574 0.000
C2 0.344 -0.574 0.000
F3 0.344 1.789 0.000
F4 -0.344 -1.789 0.000
H5 -1.423 0.677 0.000
H6 1.423 -0.677 0.000

Atom - Atom Distances (Å)
  C1 C2 F3 F4 H5 H6
C11.33771.39672.36311.08402.1646
C21.33772.36311.39672.16461.0840
F31.39672.36313.64422.08782.6920
F42.36311.39673.64422.69202.0878
H51.08402.16462.08782.69203.1514
H62.16461.08402.69202.08783.1514

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 119.570 C1 C2 H6 126.398
C2 C1 F3 119.570 C2 C1 H5 126.398
F3 C1 H5 114.033 F4 C2 H6 114.033
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/SDD Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.009      
2 C -0.009      
3 F -0.225      
4 F -0.225      
5 H 0.234      
6 H 0.234      


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 -18.494 -3.251 0.000
y -3.251 -28.062 0.000
z 0.000 0.000 -22.531
Traceless
 xyz
x 6.803 -3.251 0.000
y -3.251 -7.550 0.000
z 0.000 0.000 0.747
Polar
3z2-r21.494
x2-y29.568
xy-3.251
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.968 -0.456 0.000
y -0.456 4.683 0.000
z 0.000 0.000 1.538


<r2> (average value of r2) Å2
<r2> 84.478
(<r2>)1/2 9.191