Naming Ketones - Video Tutorials & Practice Problems

IUPAC Rules for Naming Ketones Concept 1

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.

Naming Ketones Example 1

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.

Provide the systematic name for the following ketone.

• A. 3,3-dichloro-5-hexanone
• B. 4,4-dichloro-5-hexanone
• C. 4,4-dichloro-2-hexanone
• D. 3,3-dichloro-2-hexanone

Which of the following compounds represent 2,4-dimethyl-3-pentanone?

• A.
• B.
• C.
• D.

Provide the systematic name for the following cyclic ketone. 

• A. 1-bromo-3-cyclohexanone
• B. 3-bromocyclohexone
• C. 3-bromocyclohexanone
• D. 1-bromo-3-cyclohexone

Common Naming of Ketones Concept 2

Now, when it comes to common naming, we're going to say that certain keytones have unique names given before Iupac naming system was developed. Now, the unique ones apply to these three structures here in the first one, we have our carbonel group and it's connected to two metal groups. One on each side. It is a key toone. And usually we change the e ending of our Alcaine structure to own to reflect the kone here. This becomes acetone. The next one, we have a Carboni connected to one benzene ring on the left and this metal group here on the right here, we're gonna say that this is called Aceto pone pone because we're dealing with a fenny rink. Remember Fenny reply implies that we're dealing with a benzene ring. So this structure here and then in this one, we have a carbonel group with two benzene rings attached to it. This is known as Benzo pheno. One of the benzene rings gives us the first part of the name Benzo and then the other benzene ring gives us the phenom at the end. Now, here we're going to say that for the rest of the keytones, the common name consists of two LQ groups, um names followed by Keto. So the naming convention would be substituent one, substituent two listed alphabetically. And then we end the name with Kone. So this is the rule that we're gonna apply when it comes to the common names of several types of keytones. But remember these 31, these three particular ones have unique names that were developed before iup. Naming systems were ever developed.

Naming Ketones Example 2

In this example question, it says provide a common name for the F for the Kone show. All right. So here goes our ketone structure in step one, we have to identify the two alko groups connected to the carbon carbon. Remember your carbon carbon is just a carbon double bonded to the oxygen connected to it is this al Q group which is one carbon, that's a methyl group. And then we have this carbon chain here. It's consisted of three carbon groups or three carbon atoms, 123. So that would be propol. So we've identified the two LQ groups connected to my carbon carbon step two name the LQ groups alphabetically as substituents kind of jump the gun. Here, we have already identified them as methyl and propol. Now, if they are identical ilq groups, we use a numerical prefix dye. So if they both were methyl groups, we'd say dimethyl. If they both were prop groups, we'd say diprop step three, we end name of the compound with ketone and write the names with spaces. So alphabetically M comes with four P. So this would be methyl. We need to have a space pro and what functional group is this a key to? So the common name would be methyl proppy ketone.

Give common name for following ketone.

• A. sec-butyl ethyl ketone
• B. sec-butyl propyl ketone
• C. ethyl sec-butyl ketone
• D. propyl sec-butyl ketone

Provide common name for given ketone.

• A. p-isopropyl acetophenone ketone
• B. 4-isopropyl acetophenone
• C. p-isobutyl ketone
• D. 4-isobutyl acetophenone