| 31. | Both pyrimidines and purines resemble pyridine and are thus weak bases and relatively unreactive towards electrophilic aromatic substitution.
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| 32. | In fact, most alkanes are unreactive except in extreme conditions, such as combustion or strong sunlight.
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| 33. | For example, copper is a rather unreactive metal, and has no reaction with concentrated hydrochloric acid.
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| 34. | Additionally, in dilute neutral solutions they tend to be deprotonated anions ( and thus unreactive as electrophiles ).
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| 35. | The Simmons-Smith reaction adds to alkenes while the Buchner ring expansion allows addition to typically unreactive arenes.
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| 36. | Noble gasses are particularly useful for these experiments because they are easy to handle, unreactive and relatively inexpensive.
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| 37. | Then soaking in a benzotriazole ( BTA ) ethanol solution to chelate the copper and make it unreactive.
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| 38. | Generally, amino acid residues are unreactive toward nucleophiles, but the dehydroamino acids are exceptions to this pattern.
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| 39. | Although the noble gases are generally unreactive elements, many such compounds have been observed, particularly involving the element xenon.
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| 40. | I've been reading about how one can make a compound of gold and xenon, two apparently unreactive elements.
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