| 21. | At about 200 �C, the alkene is formed by an intramolecular elimination.
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| 22. | This energy can supplement the intramolecular energy in vacuum calculated in molecular mechanics.
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| 23. | The result from intramolecular proton delivery is the reverse of the common stereochemistry.
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| 24. | An intramolecular Diels Alder reaction is carried out to form the macrocyclic ring.
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| 25. | In intramolecular organic reactions, two reaction sites are contained within a single molecule.
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| 26. | The rearrangement is intramolecular and the starting compound and reaction product are structural isomers.
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| 27. | The exact reaction mechanism is unknown but there is evidence suggesting an intramolecular reaction.
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| 28. | The polarizability of the nucleophile or involvement of intramolecular catalysis also plays a role.
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| 29. | However, necessary intramolecular rearrangement of the benzimidazole into sulfenamide posed severe geometric constraints.
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| 30. | Carbenes undergo both intermolecular and intramolecular insertion reactions.
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