| 21. | This substance, first reported in 1972, is a powerful Lewis acid.
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| 22. | Adducts often form between Lewis acids and Lewis bases.
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| 23. | This colorless salt finds some use in organic synthesis as a Lewis acid.
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| 24. | The arenium ion can also be formed by attack of the Lewis acid.
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| 25. | It reacts explosively with Lewis acids such as boron trifluoride and aluminium chloride.
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| 26. | The reaction is accelerated with a combination of dehydrating reagent and Lewis acid.
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| 27. | So Zn2 + acting like a Lewis acid template?
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| 28. | :Do all Lewis acids that bind CO catalyse its reaction to CO2?
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| 29. | Only under Lewis acid catalysis do these reactions occur under synthetically useful conditions.
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| 30. | The compounds are Lewis acids, somewhat akin to the better known aluminium trihalides.
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