Answer
397.2k+ views
Hint: Esters are organic compounds. These compounds have a functional group $\text{ }-\text{COOR}$ . It is derived from the acid where $\text{ }-\text{OH }$that is the hydroxyl group is replaced by the alkoxy $\text{ }-\text{OR}$ group. The general representation of ester is as follows,
The IUPAC nomenclature involves the two parts. The compound is visually separated from the oxygen atom adjacent to the carbonyl group. The group which is from the acid part is ended by the –oate.
Complete answer:
The ester is the organic compound. To determine the name of a compound. Follows these steps:
1) First identify the carbon which is the part of the continuous chin which is bonded to the carbon on both sides (one from alkyl and the other from carboxyl).
2) Then start the numbering by considering the oxygen on either side.
3) The general format is,
(Alkyl on the side further from the carbonyl) (Alkane on the other side of carbonyl)
4) Replace the ending of alkane .change the –e to the -oate.
Here we are interested to determine the increasing number of carbon atoms in the compounds.
The structure of ethyl methanoate has ethyl groups $\text{ }-{{\text{C}}_{\text{2}}}{{\text{H}}_{\text{5}}}\text{ }$and $\text{ }-\text{COC}{{\text{H}}_{\text{3}}}\text{ }$ on either side of the oxygen. Thus the structure of ethyl methanoate is as follows,
Thus, the ester ethyl methanoate has a total $\text{ 2 + 1 = 3 }$ number of carbon atoms.
The structure of methyl propanoate has ethyl groups $\text{ }-\text{C}{{\text{H}}_{3}}\text{ }$and $\text{ }-\text{COC}{{\text{H}}_{2}}\text{C}{{\text{H}}_{\text{3}}}\text{ }$ on either side of the oxygen. Thus the structure of ethyl methanoate is as follows,
Thus, the ester methyl propanoate has a total $\text{ 1 + 3 = 4 }$ number of carbon atoms.
The structure of propyl butanoate have propyl groups $\text{ }-\text{C}{{\text{H}}_{2}}\text{C}{{\text{H}}_{\text{2}}}\text{C}{{\text{H}}_{\text{3}}}\text{ }$and $\text{ }-\text{COC}{{\text{H}}_{2}}\text{C}{{\text{H}}_{2}}\text{C}{{\text{H}}_{\text{3}}}\text{ }$ on either side of the oxygen. Thus the structure of ethyl methanoate is as follows,
Thus, the ester methyl propanoate has a total $\text{ 3 + 4 = 7 }$ number of carbon atoms.
The structure of pentyl pentanoate has pentyl groups $\text{ }-\text{C}{{\text{H}}_{2}}\text{C}{{\text{H}}_{\text{2}}}\text{C}{{\text{H}}_{2}}\text{C}{{\text{H}}_{\text{2}}}\text{C}{{\text{H}}_{\text{3}}}\text{ }$and $\text{ }-\text{COC}{{\text{H}}_{2}}\text{C}{{\text{H}}_{2}}\text{C}{{\text{H}}_{2}}\text{C}{{\text{H}}_{\text{3}}}\text{ }$ on either side of the oxygen. Thus the structure of ethyl methanoate is as follows,
Thus, the ester methyl propanoate has a total $\text{ 5 + 5 = 10 }$ number of carbon atoms.
Thus correct order of increasing number of carbon atom is,
$\text{ }\begin{matrix}
\text{Ethyl methanoate }<\text{ Methyl propanoate }<\text{ propyl butanoate }<\text{ pentyl pentanoate} \\
(\text{Increasing number of carbon atom }\to \text{)} \\
\end{matrix}$
Hence, (B) is the correct option.
Note:
Note that esters are derived from the carboxylic acid. In naming the compound, visually we can see alcohol and the acid in the ester. The part which has the acid groups is named as the acid (-ic) and the –ic is replaced by the suffix –ate. The alkyl groups of the alcohol part are written in front of the acid part.to draw the structure, first, write down the $\text{ }-\text{O}-\text{C}=\text{O}$ groups and attached the alkyl part on the oxygen atom and –ate ending carbon atoms on the carboxyl carbon atoms.
![seo images](https://www.vedantu.com/question-sets/f0dc289a-3da3-47c1-b886-0b8bf6e36b633505349360912373011.png)
The IUPAC nomenclature involves the two parts. The compound is visually separated from the oxygen atom adjacent to the carbonyl group. The group which is from the acid part is ended by the –oate.
Complete answer:
The ester is the organic compound. To determine the name of a compound. Follows these steps:
1) First identify the carbon which is the part of the continuous chin which is bonded to the carbon on both sides (one from alkyl and the other from carboxyl).
2) Then start the numbering by considering the oxygen on either side.
3) The general format is,
(Alkyl on the side further from the carbonyl) (Alkane on the other side of carbonyl)
4) Replace the ending of alkane .change the –e to the -oate.
Here we are interested to determine the increasing number of carbon atoms in the compounds.
The structure of ethyl methanoate has ethyl groups $\text{ }-{{\text{C}}_{\text{2}}}{{\text{H}}_{\text{5}}}\text{ }$and $\text{ }-\text{COC}{{\text{H}}_{\text{3}}}\text{ }$ on either side of the oxygen. Thus the structure of ethyl methanoate is as follows,
![seo images](https://www.vedantu.com/question-sets/0851ae68-7af3-417e-87b2-9332057329f13793193328547510129.png)
Thus, the ester ethyl methanoate has a total $\text{ 2 + 1 = 3 }$ number of carbon atoms.
The structure of methyl propanoate has ethyl groups $\text{ }-\text{C}{{\text{H}}_{3}}\text{ }$and $\text{ }-\text{COC}{{\text{H}}_{2}}\text{C}{{\text{H}}_{\text{3}}}\text{ }$ on either side of the oxygen. Thus the structure of ethyl methanoate is as follows,
![seo images](https://www.vedantu.com/question-sets/9526136b-e68f-4d8c-bf4f-82a5d5dba1cc4291109215652208497.png)
Thus, the ester methyl propanoate has a total $\text{ 1 + 3 = 4 }$ number of carbon atoms.
The structure of propyl butanoate have propyl groups $\text{ }-\text{C}{{\text{H}}_{2}}\text{C}{{\text{H}}_{\text{2}}}\text{C}{{\text{H}}_{\text{3}}}\text{ }$and $\text{ }-\text{COC}{{\text{H}}_{2}}\text{C}{{\text{H}}_{2}}\text{C}{{\text{H}}_{\text{3}}}\text{ }$ on either side of the oxygen. Thus the structure of ethyl methanoate is as follows,
![seo images](https://www.vedantu.com/question-sets/5f78b0ce-dff8-40d7-8d9d-2117a96bcf0b5260366965165626111.png)
Thus, the ester methyl propanoate has a total $\text{ 3 + 4 = 7 }$ number of carbon atoms.
The structure of pentyl pentanoate has pentyl groups $\text{ }-\text{C}{{\text{H}}_{2}}\text{C}{{\text{H}}_{\text{2}}}\text{C}{{\text{H}}_{2}}\text{C}{{\text{H}}_{\text{2}}}\text{C}{{\text{H}}_{\text{3}}}\text{ }$and $\text{ }-\text{COC}{{\text{H}}_{2}}\text{C}{{\text{H}}_{2}}\text{C}{{\text{H}}_{2}}\text{C}{{\text{H}}_{\text{3}}}\text{ }$ on either side of the oxygen. Thus the structure of ethyl methanoate is as follows,
![seo images](https://www.vedantu.com/question-sets/ad7f0ba3-1bc2-4ff1-b24e-2034b6883e6f3374833221124076139.png)
Thus, the ester methyl propanoate has a total $\text{ 5 + 5 = 10 }$ number of carbon atoms.
Thus correct order of increasing number of carbon atom is,
$\text{ }\begin{matrix}
\text{Ethyl methanoate }<\text{ Methyl propanoate }<\text{ propyl butanoate }<\text{ pentyl pentanoate} \\
(\text{Increasing number of carbon atom }\to \text{)} \\
\end{matrix}$
Hence, (B) is the correct option.
Note:
Note that esters are derived from the carboxylic acid. In naming the compound, visually we can see alcohol and the acid in the ester. The part which has the acid groups is named as the acid (-ic) and the –ic is replaced by the suffix –ate. The alkyl groups of the alcohol part are written in front of the acid part.to draw the structure, first, write down the $\text{ }-\text{O}-\text{C}=\text{O}$ groups and attached the alkyl part on the oxygen atom and –ate ending carbon atoms on the carboxyl carbon atoms.
Recently Updated Pages
How many sigma and pi bonds are present in HCequiv class 11 chemistry CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Why Are Noble Gases NonReactive class 11 chemistry CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Let X and Y be the sets of all positive divisors of class 11 maths CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Let x and y be 2 real numbers which satisfy the equations class 11 maths CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Let x 4log 2sqrt 9k 1 + 7 and y dfrac132log 2sqrt5 class 11 maths CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Let x22ax+b20 and x22bx+a20 be two equations Then the class 11 maths CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Trending doubts
Fill the blanks with the suitable prepositions 1 The class 9 english CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
At which age domestication of animals started A Neolithic class 11 social science CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Which are the Top 10 Largest Countries of the World?
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Give 10 examples for herbs , shrubs , climbers , creepers
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Difference between Prokaryotic cell and Eukaryotic class 11 biology CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Difference Between Plant Cell and Animal Cell
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Write a letter to the principal requesting him to grant class 10 english CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Change the following sentences into negative and interrogative class 10 english CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)
Fill in the blanks A 1 lakh ten thousand B 1 million class 9 maths CBSE
![arrow-right](/cdn/images/seo-templates/arrow-right.png)