Ethylene
    Ethylene is the smallest ployatomic molecule that was used in this experiment. In addition to the computations performed on the other molecules the IR vibrational spectrum was reported and each peak was labeled with a live display of each primary motion associated with it.
 
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Optimized geometry and partial atomic charges for ethylene calculated using the DZV ab initio results

    The best optimized geometry came from the DZV (Double Zeta Valence) level of ab initio calculations. DZV calculations contained the largest basis set of the computational sets used in this lab and gave the lowest energy geometry of all used levels of calculation. The partial atomic charges were calculated by wxMacMolPlt software and reported in the live display over each atom.
 
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Optimized geometry for ethylene calculated using the 6-21G ab initio results

    The optimized geometry calculated by the 6-21G computational package live image is shown here.
 
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Optimized geometry for ethylene calculated using the 6-31G ab initio results

    The optimized geometry calculated by the 6-31G computational package live image is shown here.
 
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Ethylene Electrostatic potential for DZV ab initio calculation

This live display shows the electrostatic potential mapped on the molecular surface calculated from the best optimized geometry of the molecule.
 
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Ethylene HOMO for DZV ab initio calculation

    The highest occupied molecular orbital (HOMO) is shown in the live display. The HOMO is the highest energy level that is occupied by electrons in the molecule.
 
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Ethylene LUMO for DZV ab initio calculation

    The lowest unoccupied molecular orbital (LUMO) is shown in the live display. This is the lowest energy orbital that does not contain electrons.




















    The ethylene IR spectrum is shown below with each vibration labeled A-E. The circled peak is likely a combination band due to vibrations A and B being observed. Some similar vibrations were observed at the same wavenumber due to the same atoms vibrating at the same time, the best representation of the vibration was chosen as the peak.

Ethylene IR spectrum
 
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Vibration A

    The live display of vibration A is shown here with wavenumber 916.15 cm-1.
 
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Vibration B

    The live display of vibration B is shown here with wavenumber 1110.72 cm-1.



 
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Vibration C

    The live display of vibration C is shown here with wavenumber 1494.52 cm-1.

 
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Vibration D

    The live display of vibration D is shown here with wavenumber 1811.69 cm-1.


 
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Vibration E

    The live display of vibration E is shown here with wavenumber 3429.7 cm-1.

 
Based on template by A. Herráez as modified by J. Gutow
Page skeleton and JavaScript generated by export to web function using Jmol 14.2.15_2015.07.09 2015-07-09 22:22 on Mar 1, 2016.