CHE 230 Exam 3 Dr. Owen UKY Questions With Complete Solutions

What is an electrophile? correct answer: compound or ion that are poor in electron density- LOVES AVAILABLE ELECTRONS Same as Lewis Acid What is a nucleophile? correct answer: is an ion or a compound that is capable of donating a pair of electrons-- THEY WOULD LOVE TO ATTACK A NUCLEUS These are the exact same a Lewis Base THESE SHARE ELECTRON DENSITY Examples of Nucleophiles correct answer: I-, Cl-, Br-, HS-, RO-, HO-,NH2- Nucleophilic Attack correct answer: shows the nucleophile attacking the electrophile tail of the arrow starts on the electron head of the arrow ends on the nucleus *ELECTRON SHARING* Loss of a Leaving Group correct answer: this occurs when a bond breaks and one atom from the bond take BOTH electrons Proton Transfers correct answer: using a pair of electrons to take an H+ from the acid- protonated BASE ATTACKING THE ACID Carbocation Rearrangements correct answer: rearranging the charge on the carbon to make it the most stable *if a carbon can rearrange and become more stable, it is going to Increasing stability of carbocation correct answer: methyl -----> primary ----> secondary ----> tertiary (being the most stable- attached to three carbons)