Naming Esters - Video Tutorials & Practice Problems
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1
concept
Rules for Naming Esters
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59s
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Now recall ester's possess an oxygen atom connected to an al keel group. So a carbon group and a carbon chain containing a carbonel group. So ester have this as the portion that indicates what they are. Now ester have a unique naming system. The carbon chain with the carbonel group is named as though it was a carbolic acid, but it's not a carbolic acid anymore. It's an ester. So we have to modify the ending. So we're gonna modify the ending from OIC acid, which is the ending of a carbolic acid to 08, which is now the end of the name for Nester. In terms of our naming convention, we still talk about our substituents and we'll see how that works. In terms of ester. We'll have our parent chain where we modify the ending to 08. So keep this in mind as we start naming different types of ester.
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example
Naming Esters Example
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3m
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Provide the systematic name for the following ester to do that. We're gonna utilize the following steps. Step one, we have to identify the al keel group connected to the oxygen atom and we're gonna name the alki group as a substituent. Now, when it comes to this alkyl group connected to our oxygen known numerical location for the alkyl group is needed. So if we take a look here, I've highlighted the portion, that's the al Kal group. So here it's a two carbon alkyl group. So that's ethyl. Step three, we identify the carbon chain connected to the carbonel group. So here our carbonel group is highlighted in yellow here. Step four, figure out the length of the carbon chain starting from the carbonel group. So here I've already numbered it for us. So we start here. 1234. The carbon deal group is carbon number um as carbon number one is implied. Now, here we have to assign numbers for the location of each substituent on the carbon chain with the carbonel group. So here we have as our substituent, this metal group down here when more than one identical substituents, we use the prefixes of die for two, try for three and tetra for four. So here we have a methyl group and remember this is our original one, the AL Q, which is Ethel, we name all substituents in alphabetical order prefixes do not count. And here we're going to use commas to separate numbers from numbers and we're going to use dashes to separate letters from numbers. Now, letters are not separated from letters and this is important here, this is an additional step we have to take in mind where we write the alk group name with spaces. OK. So when it comes to writing this alk group that's connected to the oxygen, we write it with spaces. So let's put all this together. So E comes before M so it's gonna be ethyl. Remember this, we write it with spaces. Then we're gonna have what? On carbon number three of the carbon chain, we're gonna have a methyl. So three methyl and then here it's a four carbon chain which is butane and as a carboxylic acid, it have been Banic acid. But remember we're changing this to 08. So it becomes Butan 08. So we end in name with Butana eight. So it'd be ethyl, three methyl buthan, that'd be the name of this particular ester.
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Problem
Problem
Provide the systematic name for the following ester.
A
propyl butanoate
B
butyl propanoate
C
isopropyl butanoate
D
isobutyl propanoate
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Problem
Problem
Provide the systematic name for the following ester.
A
tert-butyl 3,3-dimethylpentanoate
B
sec-butyl 3,3-dimethylpentanoate
C
tert-butyl 4,4-dimethylpentanoate
D
isopropyl 3,3-dimethylpentanoate
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Problem
Problem
If the substituent name of benzene is phenyl, which structure represents phenyl propanoate?