Yep. Because if the NO2 group is at 1 as we're putting it at nitrobenzene therefore 1-nitrobenzene, then the methyl would be three carbons AFTER sorry. Mix up.
And if it was 2-methylnitrobenzene then it would be the carbon after the NO2 group.
Then they'd tell us the benzene derivative before the reaction and tell us to nitrate it, for instance, then we can place the NO2 group wherever we please. But usually they'll show us an azodye and tell us to work backwards from that.
The difference between hydrolysis of esters and hydrolysis of polypeptides: Esters/Acid: Dilute acid catalyst + H2O under reflux Esters/Alkali: Aqueous NaOH under reflux (No catalyst????) (Poly)peptides/Acid: Aqueous acid catalyst + H2O reflux (Poly)peptides/Alkali: Aqueous NaOH just above 100 degrees
can somebody tell me if there are lots of NH3 group on a amino acid will this increase or lower the isoelectric point ?
If there are a lot of NH2 groups, it will increase because NH2 is a basic group. If there were too many COOH groups then that would decrease as it is an acidic group.
I want you to remember one thing..... only put conc. before the acid if it is actually needed... examiners will penalise you otherwise.... GOOD LUCK!!!
Good luck to everyone with whatever your off to do in life never have to do chem again! was surprised that we got a good paper, as Jan was also easy. Hopefully no crazy grade boundaries.