Presentation on theme: "1 11 Lewis Structures of Organic Molecules Dr. C. Yau Fall 2011."— Presentation transcript:
1 11 Lewis Structures of Organic Molecules Dr. C. Yau Fall 2011
2 Organic Molecules Organic chemistry is a study of compounds containing carbon. In addition, they contain mostly H, O and some N, S and P, and other elements. Those containing metals are said to be “organometallic.” Hydrocarbons are compounds containing only H and C. They nonpolar because they contain only C-C and C-H bonds, which are nonpolar.
3 Hydrocarbons CH 4 C 2 H 6 C 3 H 8 Remember that C with 4 bonds is tetrahedral.
4 Various Representations of Organic Molecules Abbreviated Line Drawings
5 Isomers of Hydrocarbons Beyond C 3 H 8, there are isomers. For example C 5 H 12 has 3 isomers.
Classification of Organic Compounds Organic compounds are classified by the “functional group” that replaces one or more of the H atoms in a hydrocarbon. Substitution of a H with –OH transforms it into an alcohol. For example, replacing one H with –OH in methane makes it methyl alcohol (or methanol). 6