How do you number cycloalkanes?

Answer 1

A general rule to numbering any organic compound is that we always start the numbering so that the number is the smallest it can be.

For example,

would be called #1#-bromobutane as opposed to #4#-bromobutane.

This rule applies to any organic compound including cycloalkanes.

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Answer 2

Ryan Andrews

Cycloalkanes are numbered to determine the position of substituents or functional groups on the ring. The numbering starts at any carbon atom and proceeds in the direction that gives the lowest set of locants to the substituents or functional groups. The aim is to assign the lowest possible numbers to the substituents while following the rules of alphabetical order if multiple substituents are present. If the substituents are identical, the numbering should give the lowest possible combination of numbers.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.