subjects
organic chemistry
the one where the answer is right but you cannot say why. post the mechanism and a tutor walks the arrows with you.
where it usually goes wrong
the six that cost
the most marks
arrow pushing
arrows show where electrons go, not where atoms end up. most wrong mechanisms are a reasonable idea drawn from the wrong starting pair.
carbocation stability and rearrangements
a secondary cation next to a quaternary carbon will shift. hydride and methyl shifts are the step people leave out, and then the product looks impossible.
sn1 vs sn2 vs e1 vs e2
four outcomes competing over the same substrate. it turns on substitution, the nucleophile or base strength, and the solvent — change one and the answer changes.
stereochemistry
r and s assignment, enantiomers against diastereomers, and meso compounds that look chiral until you find the internal mirror.
synthesis and retrosynthesis
forwards you get stuck. backwards from the target, each disconnection asks one question: what makes this bond.
spectroscopy
nmr splitting, integration, and the ir peaks that actually distinguish a carbonyl from an alcohol.
what to post
a photo of the problem, or a sentence about where you got stuck. set the deadline and attach anything that matters — the sheet, your working, the slides.
verified tutors send offers with a price, a rating and a completion rate, and you pick who helps you. the tutor works it with you, so the next one is yours. more questions.
related
post it in the app
organic chemistry, any level.
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