The following names are incorrect. Tell what is wrong with eac...

Question

The following names are incorrect. Tell what is wrong with each, and provide the correct names.

b. Structural formula of 1,1-Diisopropylmethane with incorrect naming highlighted.

Accepted Answer

All right. Hi, everyone. So this question is asking us is the given all cane incorrectly named. If so what is wrong with the provided name? And what is its correct name? Option? A says it is correctly named because it takes into account the correct prefix and position of the substituents as well as the correct name of the parent chain. On the other hand, it is incorrectly named because B it provided the wrong prefix and position of the substituent. Its correct name is two methyl hexane. See it provided the wrong name of the parent chain and the wrong prefix of the substitute, its correct name is 11 methyl Heptane or D. It provided the wrong name of the parent chain and the wrong position of the substituent. Its correct name is two methyl heptane. So for this question, I'm going to scroll up here one more time. So we can proceed with naming the all cane. And then comparing the proposed name, which is 11 dimethyl hexane. So the first step if you recall is to always identify the parent chain and number it appropriately, the parent chain is the longest continuous chain of carbons present in the molecule, right? So here, while it would be very easy to simply number all of the carbons going across the structure, giving me a total of six, we have to take into consideration that it is the longest continuous change. So here I can incorporate one more carbon into the parent chain, right? This is the longest possible chain of carbons, which in this case, is composed of seven and a seven carbon chain has a parent name of Heptane. So take into consideration the way that I decided to number all of the carbons present in the chain itself. The reason why I decided to number my seven carbon starting from the right side and to the left, it's because that way it is closer to the branch point because there is only one substituent farther to the right, I start numbering farther to the right to make sure that that substituent has the smallest position number possible. So from here, we can proceed to our next step, which is the substitutes recall that every substituent in an Iupac name has to have a name as well as a position number. So there should be an equivalent number of position numbers to substituents. And because I only have one, I should have only one position number. Now, in this case, I only have one substituent extending from the parent chain, which in this case happens to be a methyl group, right? Only containing one carbon and I can see also that the metal group is attached to carbon two of the parent chain. So the position number is placed before the name of the substituent. So that's two dash metal. And just for the record recall that dashes are meant to separate numbers from letters in an iupac name commas are used to separate numbers. But in this case, we only have one position number. And so the third and final step is to go ahead and put everything together, right? All substituents must be listed in alphabetical order before the name of the parent chain with no spaces in between them. Now, because we don't have multiple substituents. In this case, there's no need to necessarily sort our substituents in alphabetical order. So instead my name to Methyl simply goes before the parent name, which is Hept. So that gives me two dash, Methyl Heptane. And we can see here that the name two Methyl Heptane does not match the proposed name in the question. The reason why 11 dimethyl Hes Exene was incorrect is because it did not take into account the correct number of carbons for the parent chain. So our answer here is going to be option D in the multiple choice, it is incorrectly named because it provided the wrong name of the parent chain and the wrong position of the substituent, its correct name is two methyl Heptane and there you have it. So with that being said, thank you so very much for watching. And I hope you found this helpful.

The following names are incorrect. Tell what is wrong with each, and provide the correct names.
b.

Key Concepts

Nomenclature

Taxonomy

Common vs. Scientific Names

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