Naming Ketones - Video Tutorials & Practice Problems
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1
concept
Rules for Naming Ketones
Video duration:
39s
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Now recall that ketones possess a carbon, carbon connected to two carbon atoms. Now here, the set of rules for naming keytones are similar to those used for naming alcohols here though the modifier, the ending of E is changed to one. And when we talk about the naming convention, we still have to give the locations of different substituents, we then have to give the location of the carbonel group that is part of the parent chain. And then remember that we're doing a modification to the E ending to one. These are the keys to naming any key tones that we're going to see.
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example
Naming Ketones Example
Video duration:
2m
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Here, it says provide the formal name for the key to show. Now, to do that, we're gonna use the following steps. Step one is find the longest carbon chain which represents our parent chain and assign name according to the prefixes and the modifier. Now the parent chain should include the carbonel group. So remember your carbon carbon or carbonel group is this C double Bondo and have greater number of carbons. If a tie between longest chain, choose chain with more substituents, if we take a look here, our longest carbon chain would be this portion here. Now a signed name to all substituents for step two, our substituent here would be this carbon that's branching off of the main chain. This would be a methyl group. Step three, start numbering the chain from the end closest to the carbon carbon. So we'd have to start numbering from this end 1234567 and eight. If A t the number from the end closest to the next substituent, if still a tie number in alphabetical order, in terms of the substituents and then here assigned location to the carbon carbon, the carbon carbon on carbon number two. All right. And then we repeat steps 4 to 6. And these are from previous naming topics mainly if we're looking at our cans with substituents, that's where we're coming up with these rules or steps 4 to 6. If you haven't watched that video, make sure you go back and take a look because in it, we talk about our substituents. They're written at the beginning of the name, we have to give their location, numerical location. And if there's multiple substituents, we have to name them alphabetically. So here, if we take a look, we're gonna say our substituent is on carbon five. So it's five methyl, the carbon carbon is on carbon two. So two, eight carbons is ocane, but we changed the e ending to one. So it becomes too often known. So this would be the name of this particular ketone five methyl, two opinon.
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Problem
Problem
Provide the systematic name for the following ketone.
A
4,4-dichloro-2-hexanone
B
3,3-dichloro-2-hexanone
C
4,4-dichloro-5-hexanone
D
3,3-dichloro-5-hexanone
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Problem
Problem
Which of the following compounds represent 2,4−dimethyl−3−pentanone?