Curved Arrow Formalism

Question 1

What are curved arrows in terms of chemistry?

Answer 1

The accounting system used to express the movement of electrons

Question 2

Describe the movement of electrons along an electron.

Answer 2

Electrons move from the tail to the head of a curved arrow

Question 3

What does a double-barb arrow represent?

Answer 3

It represents the movement of a pair of electrons

Question 4

What does a single-barb arrow represent?

Answer 4

It depicts the motion of a single electron

Question 5

Where must a curved arrow start?

Answer 5

Fromm either a lone pair (lp) or from a bond (sigma or pi)

Question 6

Where must a curved arrow end?

Answer 6

It must end either between a pair of atoms or on an atom

Question 7

What happens if the curly arrow ends between a pair of atoms?

Answer 7

A new bond is formed

Question 8

What happens if the curly arrow ends on an atom?

Answer 8

Then a formal charge on that destination atom will become more negative since electrons have been added to that atom

Question 9

What are the three classes of reaction arrow?

Answer 9

A lone pair forms a new bond

An existing bond breaks to form a new lone pair

An old bond breaks to form a new bond