Primer 1- Reaction Mechanisms

Question 1

Arrows are used to indicate movement of ____.

Answer 1

electrons

Question 2

Arrows are never used to indicate the movement of ___ directly.

Answer 2

atoms

Question 3

electron source

Answer 3

a bond or lone pair of electrons, usually an area of relatively high electron density, that serves as the origin of a mechanism arrow

Question 4

electron sink

Answer 4

an atom that accepts a new bond or lone pair of electrons; what an arrow points toward in an organic chemistry mechanism

Question 5

Arrows always start at an electron ___ and end at an electron ___.

Answer 5

source; sink

Question 6

Bond breaking will occur to avoid ___ on an atom serving as an electron sink.

Answer 6

overfilling valence

Question 7

nucleophile

Answer 7

“nucleus loving,” seeking a region of low electron density; an electron source that can donate a pair of electrons to form a new covalent bond; a Lewis base

Question 8

electrophile

Answer 8

“electron loving,” seeking a region of high electron density; a electron sink that can accept a pair of electrons to form a new covalent bond; a Lewis acid

Question 9

What are the three types of reactions?

Answer 9

addition, elimination, substitution