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The Nature of Organic Chemistry. DNA, Proteins, fats, gasoline, dyes, fabrics, plastics, pesticides, antibiotics… ice cream…. What is Organic Chem?. Organic or Inorganic?. study of ______________________( usually with H)
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The Nature of Organic Chemistry DNA, Proteins, fats, gasoline, dyes, fabrics, plastics, pesticides, antibiotics… ice cream…
What is Organic Chem? Organic or Inorganic? • study of ______________________(usually with H) • Organic does not mean _________and no longer necessarily means __________
Why Carbon??? • Living things are Carbon based! • Properties of Carbon make it very versatile
naturally occurring forms of pure carbon: diamond, graphite, amorphous (coal) 4 bonding electrons (= 4 bonds) Sgle, dble or tple bonds Can form long chains Bonds well with other elements (O, N, H, Cl…) = a variety of geometric shapes!! Properties of Carbon
Functional Groups or “Families” • common structural features are grouped together = functional group • Generally: similar structural feature = ___________________________________________
Predicting Properties Based on functional groups you can predict properties like: • ____________________ • ____________________ • ____________________ • ____________________
Breaking Attractions stronger inter. forces = stronger attractions = harder to break apart so increased melting and boiling point YOU MUST BE ABLE TO FIND DIPOLES & USE TO PREDICT POLARITY!!
May the FORCE be… _______________(London Dispersion) • caused by ____movement • more ____means more forces • the closer a molecule can “pack” the stronger these forces (shape) ________________ • caused by permanent + and - poles of a molecule _______________________ • severe dipole (check out electronegativity!) ________________
Add Oxygen: What does this do to the polarity of the molecule???? Add Halogens: Add Nitrogen:
Rank the following from lowest to highest melting point Which one(s) will dissolve in water???
Sites for Reactivity • Dble/tple bonds • C attached to _____ elements • _________ Any of these could be a site for reaction! Watch for more details on reactions to come!
Homework p5 #5-8 p10 #4 (practice)& #1,2 (questions)