Drawing Molecules - Organic Chem (7.2)

Question 1

Describe the main feature of a molecular formula

Answer 1

The exact number of atoms of each element present in the molecule

Question 2

Describe the main feature of a displayed formula

Answer 2

Shows both the relative placing of the atoms and the no. of bonds between them (shows all bonds btw. all atoms)

Question 3

Describe the main feature of a structural formula

Answer 3

The minimal detail using conventional groups, for an unambiguous structure e.g CH3CH(CH3)CH3

Question 4

Describe the main feature of a skeletal formula

Answer 4

Simplifies the displayed formula, removing H atoms & labels on C atoms (skeleton structure of chains)

Question 5

How are side chains shown in structural formulae?

Answer 5

Using brackets e.g CH3CH(CH3)CH3

Question 6

Give the 3 steps of drawing skeletal formulae

Answer 6

1. Remove all H atoms from C chain
2. Redraw C chain w/ zig-zag bonds
3. Remove all labels on C atoms
   (keep labels on any other atoms e.g O, N, Br, OH, NH2)