I WILL CRY IF NO ONE CAN HELP ME THIS IS SO URGENT PLEASE IM SO DESPARET NOW OMG?
1) WHY ARE THE MPT OF SAMPLE 1 AND 2 DIFFERENT?
2) IDENTIFY WHICH ISOMER THE STUDENT ANALYSED.
Nitration of benzene
Reacted samples of phenol with reagents
Seperated the 2 organi prod from reaction by chromatography
Suspected 2 products were structural isomers with NO2 substitudes at 2 and 4 positions
Suspected structures =
Measured MPT of one of products, then recrystallised sample and took MPT of recrys. product
Sample 1 = MPT before recrys. 104-108 degres
2 = MPT after recrys - 110-114 degres
MPT from databse of structural isomers = 2-nitro isomer = 44 degrees
4-nitro isomer 112 degrees
- redbeardthegiantLv 78 years agoFavorite Answer
Often [usually] mixtures melt lower than the pure substances.
You likely had some of the ortho in there, or perhaps unreacted phenol.
With luck you had NO trinitrophenol, aka, picric acid, which is prone to detonate.Source(s): chem engineer