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Chapter 9

Chapter 9 . Carbon Chemistry. Ch 9.1 – Simple Organic Compounds. A. All living things on Earth are made of organic compounds –contain carbon and associated with living (or once living) organisms. B. A compound containing only carbon and hydrogen atoms is a hydrocarbon.

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Chapter 9

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  1. Chapter 9 Carbon Chemistry

  2. Ch 9.1 – Simple Organic Compounds A. All living things on Earth are made of organic compounds–contain carbon and associated with living (or once living) organisms

  3. B. A compound containing only carbon and hydrogen atoms is a hydrocarbon

  4. 1. Methane – the primary component of natural gas, is the simplest hydrocarbon

  5. a) Chemical formula – CH4 b) The molecule contains 4 single covalent bonds

  6. 2. If one H is removed from a methane molecule –CH3 remains which is known as a methyl group

  7. a) If two methyl groups bond together they form ethane C2H6 b) Methane and ethane are saturated hydrocarbons

  8. Formation of Ethane

  9. C. Saturated hydrocarbons– have single covalent bonds between every atom in the molecule 1. Known as saturated because have no remaining places for any additional hydrogen atoms to bond

  10. 2. Molecule names all end with -anesuffixes

  11. 3. Other examples include propane (C3H8) and butane (C4H10)

  12. 4. Short hydrocarbon chains have low boiling points which evaporate and burn easily making them good fuels 5. Longer hydrocarbons are found in oils and waxes; these extremely long chains make up many carbohydrates

  13. D. Unsaturated hydrocarbons– have double or triple covalent bonds between carbon atoms therefore are not filled with hydrogen at every bonding site

  14. Double bonds a) Names end with –ene b) Ethene (C2H4) – has a double bond between the carbons

  15. 2. Triple bonds a) Names end with –yne b) Acetylene (C2H2) – has a triple bond between the carbons; used in welder’s torches

  16. E. Isomers – hydrocarbons with the same chemical formula but different structures 1. Ex: Butane & Isobutane

  17. F. Hydrocarbons in a circular structure can contain one or more double bonds 1. Names contain the prefix cyclo- 2. Ex: cyclohexane (Hexane)

  18. Ch 9.2 – Other Organic Compounds • Substituted hydrocarbons–have a hydrogen atom replaced with something else

  19. 1. Alcohols – form when a hydrogen is replaced with a hydroxyl group(an oxygen and hydrogen covalently bonded –OH)

  20. Methanol(CH3OH) – AKA wood alcohol; used in antifreeze CH3 + OH CH3OH

  21. b) Ethanol (C2H5OH) - AKA drinking alcohol; made naturally when sugar in corn, grains or fruits ferments; also used as fuel additive

  22. c) Isopropyl alcohol(C3H7OH) – AKA rubbing alcohol; used commonly as a disinfectant

  23. 2. Carboxylic Acids– form when a hydrogen is replaced by a carboxyl group (-COOH)

  24. a) Found in the stings and bites of many insects

  25. b) Also common in many foods such as fruits and vinegar Acetic Acid

  26. 3. Amines – form when a hydrogen is replaced by an amino group(-NH2) a) Methylamine (CH3NH2) – responsible for strong odor in cheese

  27. 4. Amino Acids– form when 2 hydrogen are replaced, one by an amino groupand the other by a carboxyl group a) Amino acids are the building blocks of proteins b) Ex: Glycine & Alanine (There are 20 different types)

  28. Ethane based substituted hydrocarbons

  29. Ch 9.3 – Biological Compounds A. Polymer – a molecule made of many small organic molecules linked together by covalent bonds 1. The small molecules that form polymers are called monomers 2. The chemical reaction that bonds these monomers is called polymerization

  30. B. Proteins – polymer consisting of a chain of individual amino acids linked together 1. There are 20 different amino acids 2. Make up many structures in the body such as muscles, tendons, ligaments, hair, fingernails and hemoglobin

  31. 2. Some proteins are made in the body while others must be obtained by food

  32. C. Carbohydrates – polymer consisting of only carbon, hydrogen and oxygen 1. Sugars – simple carbs containing only 5, 6 or 7 carbon atoms arranged in a ring shaped structure a) Ex: glucose, fructose, sucrose

  33. Other Sugars

  34. 2. Starches – complex carbs made of hundreds of sugar molecules

  35. 3. Fiber – carb made of glycogen (glucose molecules) that forms cellulose in plant cell walls a) Cannot be used by humans as an energy source but other animals such as cows can

  36. D. Lipids – contain the same elements as carbohydrates but in a different arrangement 1. Endothermic reactions form lipids so when bonds between the atoms contain a large amount of energy which can be released if broken

  37. 2. Two types of lipids a) Saturated lipids – come from animals and are typically solids; have all single bonds in straight chain

  38. b) Unsaturated lipids– come from plants and are typically liquids; have a bent chain where double bonds occur

  39. E. Cholesterol –complex lipid present in foods that come from animals 1. Can cause atherosclerosis is too much is present in the bloodstream

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