| 11. | In a similar manner, propane and cyclopropane, butane and cyclobutane, etc.
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| 12. | An example of a unimolecular reaction, is the isomerization of cyclopropane to propene:
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| 13. | The simplest examples of angle strain are small cycloalkanes such as cyclopropane and cyclobutane.
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| 14. | This was used for the first synthesis of cyclopropane by August Freund in 1881.
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| 15. | The initially formed cyclopropane undergoes a ring expansion and subsequent elimination of hydrogen fluoride.
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| 16. | Thus, the two products are S-adenosylhomocysteine and phospholipid cyclopropane fatty acid.
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| 17. | It has a strained ring system with a cyclopentane ring fused to a cyclopropane ring.
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| 18. | Cyclopropane is an anaesthetic when inhaled.
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| 19. | Singlet carbenes add stereospecifically to alkenes, and alkene stereochemistry is retained in the cyclopropane product.
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| 20. | In the 1980s it was found that dirhodium catalysts provide single cyclopropane isomers in high yields.
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