Alicyclics and Aromatics
Wednesday, April 20, 2011 /6:29 PM
-Carbon chains can form 2 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: "cyclo" is added infront of the parent chain
There are 3 different ways to draw organic compounds:
- Complete structural diagram
- Condensed structural diagram
- Line Diagram (mostly used because its way easier to draw and you dont have to include all the hydrogens) :)
*Numbering can start anywhere and go clockwise or counterclockwise on the loop but side chain numbers MUST be the lowest possible!*
Examples:
Name the following compounds:
1) 1,3 dimethyl [numbering is in red]
2) 1 methyl cyclopropane [numbering is in red]
Aromatics:
-Benzene (C6H6) is a cylic hydrocarbon with unique bonds between the carbon atoms
-Structurally it can be drawn with alternating double bonds
-careful analysis shows that all 6 c-c bonds are identical and really represent a 1.5 bond
-this is due to e- resonance
-e- are free to move all around the ring
Aromatic nomenclature:
-A Benzene molecule is given a special diagram to show its unique bond structure
-Benzene can be a parent chain or a side chain
-As a side chain is given the name phenyl
Examples:
Draw the diagrams for:
1) 1 methyl 2 butyl 3 ethyl benzene
2) 5 methyl 2 phenyl hexane
Name the following compunds:
1) 6 butyl 2,4 diethyl 1,3 dimethyl 5 propyl bezene
2) 6 ethyl 5 phenyl 2 propyl 1 nonene
~christina :]
