Alicyclics & Aromatics

• Carbon chains can form two types of closed loops
• Alicyclics are loops usually made with single bonds
• If the parent chain is a loop standard naming rules apply with one addition

Cyclopentane

• There are three different ways to draw organic compounds

Condensed Structural Diagram

Complete Structural Diagram

Line Diagram

• Numbering can start anywhere and go clockwise and counterclockwise on the loop but side chain numbers must be the lowest possible

EXAMPLES:
 1,1 dimethyl cyclobutane

1,3 diethyl cyclohexane

• Loops can also be a sidechain
• Same rules apply but the side chain is given a cyclo-prefix
  
  2 cyclobutane octane
  or
  2 methyl 3 cyclopropyl 1 pentene

Aromatics:

• Benzene (C6H6) is a cyclic hydrocarbon with unique bonds between the carbon atoms
  Structurally it can be drawn with alternating double bonds
  
  
  
  or with a circle in the middle