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-, (Z)-)

using model chemistry: B3LYP/cc-pVDZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at B3LYP/cc-pVDZ
 hartrees
Energy at 0K-277.061207
Energy at 298.15K-277.063595
Nuclear repulsion energy113.081971
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-pVDZ
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 3236 3139 8.97      
2 A1 1782 1729 48.43      
3 A1 1276 1238 33.39      
4 A1 1023 992 65.86      
5 A1 228 221 2.33      
6 A2 863 837 0.00      
7 A2 511 496 0.00      
8 B1 786 762 32.04      
9 B2 3212 3116 1.16      
10 B2 1389 1347 37.03      
11 B2 1142 1108 117.38      
12 B2 769 746 29.48      

Unscaled Zero Point Vibrational Energy (zpe) 8108.7 cm-1
Scaled (by 0.97) Zero Point Vibrational Energy (zpe) 7865.4 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-pVDZ
ABC
0.70987 0.19208 0.15117

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.665 0.576
C2 0.000 -0.665 0.576
F3 0.000 1.396 -0.551
F4 0.000 -1.396 -0.551
H5 0.000 1.248 1.498
H6 0.000 -1.248 1.498

Atom - Atom Distances (Å)
  C1 C2 F3 F4 H5 H6
C11.33011.34272.34851.09132.1241
C21.33012.34851.34272.12411.0913
F31.34272.34852.79122.05423.3449
F42.34851.34272.79123.34492.0542
H51.09132.12412.05423.34492.4967
H62.12411.09133.34492.05422.4967

picture of Ethene, 1,2-difluoro-, (Z)- state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 F4 122.962 C1 C2 H6 122.310
C2 C1 F3 122.962 C2 C1 H5 122.310
F3 C1 H5 114.728 F4 C2 H6 114.728
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.143      
2 C 0.143      
3 F -0.164      
4 F -0.164      
5 H 0.020      
6 H 0.020      


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 2.152 2.152
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -22.078 0.000 0.000
y 0.000 -21.872 0.000
z 0.000 0.000 -19.505
Traceless
 xyz
x -1.389 0.000 0.000
y 0.000 -1.081 0.000
z 0.000 0.000 2.470
Polar
3z2-r24.940
x2-y2-0.205
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.749 0.000 0.000
y 0.000 4.673 0.000
z 0.000 0.000 3.207


<r2> (average value of r2) Å2
<r2> 0.000
(<r2>)1/2 0.000