Table of Contents
What is the priority order of functional group?
When compounds contain more than one functional group, the order of precedence determines which groups are named with prefix – i.e. as substituents –, or suffix forms – i.e. as part of the parent name of the molecule. The highest precedence group takes the suffix, with all others taking the prefix form.
Which functional group has higher priority?
According to IUPAC convention, Carboxylic Acids and their derivatives have the highest priority then carbonyls then alcohols, amines, alkenes, alkynes, and alkanes, so in this case the Carboxylic acid group has the highest priority and therefore makes up the name of the base compound.
What are complex substituents?
When two chains of equal size are present The chain with more number of side chains forms a part of the longest carbon chain while the other one is considered the complex substituent. On the complex substituent, numbering is done from the end attached to the principal chain.
How can you tell the difference between esters?
Ester and Ether are functional classes that are used to classify organic chemical compounds….Ester vs Ether.
| Ester | Ether |
|---|---|
| A double bond between carbon and oxygen atom | A single bond between carbon and oxygen atom |
| Ethyl propanoate is one of the examples of ester | Dimethyl ether is one of the examples of ether |
How do you determine the priority of a functional group?
Compare the molecular mass of the functional groups. About 99\% of the times, the functional group having more molecular mass will have more priority. If you take ketone as =O then treat this thing as an exception.
What is the correct order of the functional groups in IUPAC?
What is the correct order of the priority of functional groups in the IUPAC system? 1 -COOH carboxylic acid 2 -SO3H sulphonic acid 3 -RCOOCOR anhydride 4 -RCOOR ester 5 -RCOCl alkanyl chloride 6 -RCONH2 amide 7 -RCN cynide 8 -RNC isocynide 9 -RCHO aldehyde 10 -RCOR ketone
Why are functional groups numbered in alphabetical order?
Here all the functional groups such as nitro, alkoxy and chloro groups have no priority and always considered as side chains. So the numbering is given based on the lowest sum of locants and prefixes are arranged in alphabetical order. Here is a video on how to remember the priority order in easy way.
How to remember functional groups in nomenclature of organic compounds?
For nomenclature of organic compounds,you need to remember the priority order of the functional groups. I am giving the priority order and as well as a technique to remember it ! For remembering them in a easier way…