| 1. | Symmetry arguments suggest that most ligands engage metals via multiple bonds.
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| 2. | This effect is shown by those compounds containing multiple bonds.
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| 3. | Multiple pairs represent multiple bonds, such as double bonds and triple bonds.
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| 4. | Cycloalkanes do not contain multiple bonds, whereas the cycloalkenes and the cycloalkynes do.
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| 5. | For multiple bonds and lone pairs, different localization procedures ? and ? symmetry.
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| 6. | Metals, too, can engage in multiple bonding in a metal ligand multiple bond.
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| 7. | Also, the energy estimate can be only used for single, not for multiple bonds.
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| 8. | This was added for clarity-multiple bonds are not normally coloured in skeletal formulae ."
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| 9. | Note that when used to refer to moieties, multiple single bonds differ from a single multiple bond.
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| 10. | Except for aromatic compounds, unsaturated hydrocarbons are highly reactive and undergo addition reactions to their multiple bonds.
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