CPC Organic Chemistry & Synthesis Flashcards
6 cards from real CPC practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 CPC Organic Chemistry & Synthesis flashcards as text
The Markovnikov addition of HBr to propene predominantly gives which product?
Answer: 2-bromopropane
Markovnikov's rule states that HBr adds so that the H goes to the carbon with more hydrogens, placing the Br on the more substituted (more stable) carbon.
Which functional group transformation is achieved by the Wittig reaction?
Answer: Carbonyl (aldehyde/ketone) to alkene
The Wittig reaction converts aldehydes or ketones to alkenes using a phosphonium ylide, replacing the C=O with C=C.
In electrophilic aromatic substitution, an electron-donating group on a benzene ring directs incoming electrophiles to which positions?
Answer: ortho and para positions
Electron-donating groups activate the ring and direct electrophiles to the ortho and para positions by stabilizing the arenium ion intermediates at those positions.
Which reaction converts a primary amide to a primary amine with one fewer carbon?
Answer: Hofmann rearrangement
The Hofmann rearrangement uses Br2/NaOH to convert a primary amide (RCONH2) to a primary amine (RNH2), losing one carbon as CO2.
What type of isomerism is exhibited by cis- and trans-2-butene?
Answer: Geometric (cis/trans) isomerism
Cis- and trans-2-butene are geometric isomers (E/Z isomers) that differ in the spatial arrangement of groups around the restricted C=C double bond.
Which oxidation state change occurs when a secondary alcohol is oxidized to a ketone using PCC?
Answer: Carbon is oxidized (loses H, gains O)
PCC oxidizes the secondary alcohol by removing the hydroxyl hydrogen, increasing the carbon's oxidation state as it forms the ketone C=O.