IUPAC and Common names of compounds
- Aldehyde (Alkanals) CnH2n+1 CHO
HCHO Methanal Formaldehyde
CH3CHO Ethanal Acetaldehyde
CH3CH2CHO Propanal propion Aldehyde
- Ketone :CnH2n+1CO CnH2n+1
CH3-CO-CH3 Propanaone DiMethylKetone
CH3-CO=CH2CH3 Butanone EthylMethyl Ketone
- Carboxylic acid: – CnH2n+1COOH
HCOOH = Methanoic Acid Formic Acid
CH3COOH = Ethanoic Acid Acetic Acid
- Amines: – CnH2n+1NH2
CH3NH2 Methane-Amine MethylAmine
RULES FOR IUPAC
- Select the longest continuous carbon chain.
- Longest chain with maximum number of substituent is selected.
- Numbering is done in such way that substituent gets the lowest number.
- It two substituent are present, than we follow as the lowest sum rule.
- If the same subsequent appears twice or thrice then di, tri, or is used.
- If different substituent is present, than alphabetical order is followed.
- If double or triple bond is present in addition to substituent then double or triple bond gets the lowest number.
- If both double and triple bond are present, than lowest number is given to double bond.
- In IUPAC: Name is written in order-
Prefix… Word Root…. Primary Suffix….. Seconadry Suffix
In case of double & triple bond
- Select chain that involves double or triple bond.
- Suffix ene or yne are used.
- Multiple bonds should get the lowest number.
- If multiple bond occurs two or more, than prefix di, tri etc.
- Double bond is given preference over triple bond.