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 C2H4 (Ethylene)

using model chemistry: B1B95/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D2H 1Ag
Energy calculated at B1B95/3-21G
 hartrees
Energy at 0K-78.106161
Energy at 298.15K-78.109370
HF Energy-78.106161
Nuclear repulsion energy33.460250
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 B1B95/3-21G
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 3190 3052 0.00 160.98 0.11 0.21
2 Ag 1724 1650 0.00 6.58 0.10 0.19
3 Ag 1433 1371 0.00 33.28 0.46 0.63
4 Au 1086 1039 0.00 0.00 0.00 0.00
5 B1u 3172 3035 11.40 0.00 0.00 0.00
6 B1u 1532 1466 9.48 0.00 0.00 0.00
7 B2g 1016 972 0.00 1.32 0.75 0.86
8 B2u 3276 3134 23.41 0.00 0.00 0.00
9 B2u 875 837 2.86 0.00 0.00 0.00
10 B3g 3244 3104 0.00 110.25 0.75 0.86
11 B3g 1286 1230 0.00 1.16 0.75 0.86
12 B3u 1001 958 124.70 0.00 0.00 0.00

Unscaled Zero Point Vibrational Energy (zpe) 11417.7 cm-1
Scaled (by 0.9567) Zero Point Vibrational Energy (zpe) 10923.3 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 B1B95/3-21G
ABC
4.93454 1.01020 0.83854

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/3-21G

Point Group is D2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.663
C2 0.000 0.000 -0.663
H3 0.000 0.921 1.235
H4 0.000 -0.921 1.235
H5 0.000 -0.921 -1.235
H6 0.000 0.921 -1.235

Atom - Atom Distances (Å)
  C1 C2 H3 H4 H5 H6
C11.32561.08371.08372.10892.1089
C21.32562.10892.10891.08371.0837
H31.08372.10891.84113.08002.4691
H41.08372.10891.84112.46913.0800
H52.10891.08373.08002.46911.8411
H62.10891.08372.46913.08001.8411

picture of Ethylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H5 121.844 C1 C2 H6 121.844
C2 C1 H3 121.844 C2 C1 H4 121.844
H3 C1 H4 116.311 H5 C2 H6 116.311
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.413      
2 C -0.413      
3 H 0.207      
4 H 0.207      
5 H 0.207      
6 H 0.207      


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 -15.316 0.000 0.000
y 0.000 -12.034 0.000
z 0.000 0.000 -11.854
Traceless
 xyz
x -3.372 0.000 0.000
y 0.000 1.551 0.000
z 0.000 0.000 1.821
Polar
3z2-r23.641
x2-y2-3.282
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 0.922 0.000 0.000
y 0.000 2.820 0.000
z 0.000 0.000 4.334


<r2> (average value of r2) Å2
<r2> 22.920
(<r2>)1/2 4.787