ChemistryEasyHigh School (11–12)Organic Compounds with Functional Groups › Alcohols, Phenols and Ethers
Naming straight-chain alcohols
You will write three small functions that name and sort the straight-chain alcohols. The name comes from the number of carbons and the place of the OH group.
The idea. The chain is numbered from the end that gives the OH carbon the lower number. The name is the stem, then an, then the number, then ol. Methanol and ethanol have no number, because there is only one place for the OH.
Your tasks.
- Complete
lowest_locant(chain, position)so that it returns the lower of the number counted from the left and the number counted from the right. - Complete
name_alcohol(chain, position)so that it returns the name, such asbutan-2-ol. Uselowest_locant. - Complete
classify(chain, position)so that it returns"primary"when the lowest locant is 1, and"secondary"otherwise.
Contributed by StemPy Labpython
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A worked solution
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Do the tasks in the editor first, and run the checker after each one. Its hints help when a check fails. When you are ready, compare your code with this solution.
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