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PUMPA - SMART LEARNING
எங்கள் ஆசிரியர்களுடன் 1-ஆன்-1 ஆலோசனை நேரத்தைப் பெறுங்கள். டாப்பர் ஆவதற்கு நாங்கள் பயிற்சி அளிப்போம்
Book Free DemoLet us try to name some of the other classes of organic compounds using IUPAC rules:
1. ![7aa.PNG](https://resources.cdn.yaclass.in/e62e292f-5170-46e7-bee9-9f267422091e/7aaw300.png)
![7aa.PNG](https://resources.cdn.yaclass.in/e62e292f-5170-46e7-bee9-9f267422091e/7aaw300.png)
Step 1: According to rule \(1\), there is three-membered carbon chain; hence, the root word is 'Prop'.
Step 2: According to rule \(2\), all the bonds between carbon atoms are single bond, and thus the primary suffix is ‘ane’.
Step 3: According to rule \(3\), the carbon chain is numbered from the end closest to the \(-OH\) group that has the lowest locant number, as shown below
![7bb.PNG](https://resources.cdn.yaclass.in/2b03832a-3ba2-4b76-984e-88c3567e6c21/7bbw300.png)
Numbering of the carbon chain
Step 4: The locant number is \(1\) for the \(-OH\) group, and hence the secondary suffix is ‘\(-1-ol\)’.
Note: According to rule \(5\), when the primary and secondary suffixes are combined, the primary suffix's terminal 'e' is removed.
Hence, the name of the given compound is \(\text{Prop + ane + (-1-ol) = Propan-1-ol}\).
2. ![34.png](https://resources.cdn.yaclass.in/6684f358-7520-4dd4-afdf-9215fecc42b2/34.png)
![34.png](https://resources.cdn.yaclass.in/6684f358-7520-4dd4-afdf-9215fecc42b2/34.png)
Step 1: According to rule \(1\), there is two-membered carbon chain; hence, the root word is 'Eth'.
Step 2: According to rule \(2\), all the bonds between carbon atoms are single bond, and thus the primary suffix is ‘ane’.
Step 3: The given compound contains carboxylic acid group (\(-COOH\)), and hence the secondary suffix is 'oic acid'.
Note: According to rule \(5\), when the primary and secondary suffixes are combined, the primary suffix's terminal 'e' is removed.
Hence, the name of the given compound is \(\text{Eth + ane + oic acid = Ethanoic acid}\).
3. ![alde.PNG](https://resources.cdn.yaclass.in/e50167ed-e55b-4116-98fe-5f7590b92384/aldew300.png)
![alde.PNG](https://resources.cdn.yaclass.in/e50167ed-e55b-4116-98fe-5f7590b92384/aldew300.png)
Step 1: According to rule \(1\), there is two-membered carbon chain; hence, the root word is 'Eth'.
Step 2: According to rule \(2\), all the bonds between carbon atoms are single bond, and thus the primary suffix is ‘ane’.
Step 3: The given compound contains an aldehyde group (\(-CHO\)), and hence the secondary suffix is 'al'.
Note: According to rule \(5\), when the primary and secondary suffixes are combined, the primary suffix's terminal 'e' is removed.
Hence, the name of the given compound is \(\text{Eth + ane + al = Ethanal}\).
4. ![8a.PNG](https://resources.cdn.yaclass.in/7e9fb93c-5ba5-416d-bd81-dd8ea32675d6/8aw300.png)
![8a.PNG](https://resources.cdn.yaclass.in/7e9fb93c-5ba5-416d-bd81-dd8ea32675d6/8aw300.png)
Step 1: According to rule \(1\), there is a four-membered carbon chain; hence, the root word is 'But'.
Step 2: According to rule \(2\), all the bonds between carbon atoms are single bon, and thus the primary suffix is ‘ane’.
Step 3: The given compound contains ketone group (\(-C=O\)), and hence the secondary suffix is 'one'.
Step 4: The numbering of carbon chain occurs in such a way that the lowest possible number is given to the functional group in the chain.
So, its locant number is \(2\). Thus the suffix is ‘\(2-one\)’.
![8b.PNG](https://resources.cdn.yaclass.in/b83a6432-36c0-4025-8515-a8e0a8251760/8bw300.png)
Numbering of the carbon chain
Note: According to rule \(5\), when the primary and secondary suffixes are combined, the primary suffix's terminal 'e' is removed.
Hence, the name of the given compound is \(\text{But + ane + (-2-one) = Butan-2-one}\).
5. ![9a.PNG](https://resources.cdn.yaclass.in/0d4ebace-782f-4bbe-b343-71123ae238dc/9aw300.png)
![9a.PNG](https://resources.cdn.yaclass.in/0d4ebace-782f-4bbe-b343-71123ae238dc/9aw300.png)
Step 1: According to rule \(1\), there is a four-membered carbon chain; hence, the root word is 'But'.
Step 2: According to rule \(2\), all the bonds between carbon atoms are single bond, and thus the primary suffix is ‘ane’.
Step 3: The given compound contains halogen group (\(Cl\)), and hence the prefix is 'chloro'.
Step 4: According to rule \(6\), the substituent is a halogen group compound located at the first carbon atom.
The numbering of carbon chain occurs in such a way that the lowest possible number is given to the functional group in the chain.
![9bb.PNG](https://resources.cdn.yaclass.in/1a00868d-5070-4a97-a5c4-cbbda00b3522/9bbw300.png)
Numbering of the carbon chain
So, its locant number is \(1\). Thus the prefix is ‘\(1-chloro\)’.
Hence, the name of the given compound is \(\text{1-chloro + But + ane = 1-Chloro butane}\).
The below are some of the IUPAC names of various classes of compound:
![pic4.png](https://resources.cdn.yaclass.in/c0c7c234-e73f-4acc-b3e4-98ca7b3fd07a/pic4w658.png)