Number the parent chain, identify and assign a location (carbon number) to each substituent: Just as with the parent chain prefixes, substituent prefixes are another terminology you will have t memorize! Give the first substituent the lower possible number.There is no easy way around it, so try covering the table up and recalling to help with memorization. Name the parent chain: In order to correctly name the parent chain, you will have to commit to memorizing the prefixes that denote how many carbons are in the parent chain.In the second example below, two 7-carbon chains are possible, but only one gives 2 substituents, so it is therefore the correct parent chain! For two chains of equal length, the parent chain should be the chain with the greater number of substituents. Looking at the first example below, several chain lengths are shown, however only the red trace contains the longest chain, therefore this is the correct parent chain. Identify the parent chain: Choose the longest chain. Follow along to determine the name of any molecule in your course.įour discrete steps are required when assigning the name of an alkane: We here at StudyOrgo have summarized the process down to 4 easy steps to name alkanes. It is possible to name a single molecule in many different ways, but only one is correct! These are easy points on quizzes and exams and can boost your grade if you know how to tackle them. Naming molecules is a challenging exercise because there are many rules the more complex the molecule, the more rules that need to be observed.
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