Organic chemistry is the study of carbon-containing compounds.

Compounds that are formed from carbon and hydrogen.

(Natural) occurs

naturally

(Synthetic) man-made

-Willow tree-

SALICINThe model at the bottom right of the picture shows a close relative of salicin.

Scientists made, or synthesized, this chemical near the end of the nineteenth century.

It is called acetyl salicylic acid (ASA). You probably know it better by its brand name, Aspirin™.

Origin of Hydrocarbons

Representing Hydrocarbons

MOLECULAR FORMULA

Tells the number of atoms of each element

in a compoundSTRUCTURAL FORMULA

Two-dimensional representation of the

structure of a compound. Also called structural

diagram.

Three kinds of Structural Diagrams

Use the compound C6H14 as an example.6 Carbon atoms

14 Hydrogen atoms

First

Second

Third

IsomersCompounds with same molecular formulas but different structural formulas. C6H14 for example.

Think of another possible isomer of C6H14 and draw the complete structural formula/diagram.

Draw the structural formula for all the isomers of C5H12.

Let’s practice!

Draw the structural formula for all the isomers of C3H8.

Draw the structural formula for all the isomers of C7H16.

Three-Dimensional Structural Diagrams

The shape of CH4 (Methane) is tetrahedral as predicted by VSEPR theory and proven by orbital hybridization.

Our knowledge about VSEPR theory and orbital hybridization will help us make three-dimensional models of isomers.

Classifying

Hydrocarbons

Alkanes

3 facts about Alkanes

Properties of Alkanes

Naming Alkanes

Straight-Chain

Alkanes

Branched-Chain Alkanes

Name it!

Draw it!