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Multiple bonds behave as a single electron pair bond in structure determination |
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Answer» Answer: They don’t behave like other bonds. So we have single bond between TWO s electrons. The bond can rotate and bend. Stretch as well. This gives US interesting IR spectra, plus others. We then have double bonds eg. Ethylene CH2=CH2 it has an s bond plus a PI bond. They cannot rotate. It’s polymer is polyethylene. You can have Low Density and High Density Polyethylene. Put a CHLORIDE atom instead of a hydrogen atom and we have Vinyl chloride. It’s polymer is of course PVC. Put a Methyl group in instead of a Hydrogen and we have Polypropylene. Put a Benzene group in and we have polystyrene. etc, etc We can then have a triple bond and just CH each end and we have the gas acetylene. I sigma and two pi bonds. Of course it cannot rotate. So they don’t behave the same. The nomenclature goes back to the 1970’s , when I took my DEGREE. |
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