There are three xylenes. Their melting points are 13 degrees C,
-24 degrees C, and -48 degrees C. Nitration of the isomer with the 13 degree C mp results in only one mononitrated product. The isomer with mp= -24 degree C gives two mononitrated products, and the isomer with mp -48 degrees C gives three mononitrated products. Write the structure for each respective mp isomer and their nitration products.
To determine the structures of the xylenes and their nitration products, we need to analyze the given information about their melting points and the number of mononitrated products formed.
1. Xylene with a melting point of 13 degrees C:
This isomer gives only one mononitrated product upon nitration. Since it is a mononitrated product, it means only one of the six hydrogen atoms in the xylene molecule is replaced by a nitro group (-NO2). The structure of this isomer is therefore:
- Methyl group (-CH3) attached to the benzene ring
- A single nitro group (-NO2) attached to the benzene ring
2. Xylene with a melting point of -24 degrees C:
This isomer gives two mononitrated products upon nitration. It means that two different positions on the benzene ring are substituted by a nitro group. The structure of this isomer can be one of the two possible structures:
- Dimethyl group (-CH3) attached to the benzene ring
- Two nitro groups (-NO2) attached to the benzene ring, at different positions
3. Xylene with a melting point of -48 degrees C:
This isomer gives three mononitrated products upon nitration. It means that three different positions on the benzene ring are substituted by a nitro group. The structure of this isomer can be one of the three possible structures:
- Trimethyl group (-CH3) attached to the benzene ring
- Three nitro groups (-NO2) attached to the benzene ring, at different positions
It is important to note that without more information, we cannot determine the exact positions of the methyl groups on the benzene ring or the specific positions of the nitro groups in each isomer. The given information only allows us to determine the number of mononitrated products formed for each respective isomer.