Question

CH3-CH2-CH2-CH2-CO-CH2-CH2-Cl
Write IUPAC name

Answer 1

Answer:

1-chlorohexan-2-one

Explanation:  

CH₃-CH₂-CH₂-CH₂-CO-CH₂-Cl

We can see that this is a ketone, as it has a R-CO-R' formula, where R and R' are alkyl or aryl radicals (substituents).

 CH₃-CH₂-CH₂-CH₂-CO-CH₂-Cl

   6     5      4      3     2    1  

we can write the formula like this as well : C₄H₉ - CO - CH₂Cl.

This way we can indentify the IUPAC name for this particular ketone. It is : 1-chlorohexan-2-one

or  1-chloro-2-hexanone.

(both versions  accepted in IUPAC)  

(1-chloro since the Cl atom is bonded to the first carbon of the chain;

hexan- because the main carbon chain has 6 carbons and 0 double bonds so it takes the name of the 6 carbon alkane;

-2- because the carbonyl (CO) group is located in the second carbon of the chan
-one is the suffix for ketones. )