Chapter 6 Inorganic and Organic Compounds: Names and Formulas 6.6 Organic Compounds Basic Chemistry 1 Copyright © 2011 Pearson Education, Inc. Organic Compounds An organic compound • is a compound with one or more C atoms • has many H atoms • may also contain O, S, N, P, and halogens Basic Chemistry 2 Copyright © 2011 Pearson Education, Inc. Properties of Organic Compounds • Propane, C3H8, is an organic compound used as a fuel. • NaCl, salt, is an inorganic compound composed of Na+ and Cl ions. Basic Chemistry 3 Copyright © 2011 Pearson Education, Inc. Organic Compounds Typical organic compounds • contain carbon • have covalent bonds • have low melting points • have low boiling points • are flammable • are soluble in nonpolar solvents Basic Chemistry 4 Copyright © 2011 Pearson Education, Inc. Comparing Organic and Inorganic Compounds Basic Chemistry 5 Copyright © 2011 Pearson Education, Inc. Learning Check Identify each of the following characteristics as most typical of compounds that are (I) inorganic or (O) organic: __1. has a high melting point __2. not soluble in water __3. formula is CH3─CH2─CH3 __4. formula is MgCl2 __5. burns easily in air __6. has covalent bonds Basic Chemistry 6 Copyright © 2011 Pearson Education, Inc. Solution Identify each of the following characteristics as most typical of compounds that are (I) inorganic of (O) organic: I 1. has a high melting point O 2. not soluble in water O 3. formula is CH3─CH2─CH3 I 4. formula is MgCl2 O 5. burns easily in air O 6. has covalent bonds Basic Chemistry 7 Copyright © 2011 Pearson Education, Inc. Tetrahedral Structure of Carbon VSEPR theory predicts that a carbon atom with four single, covalent bonds is tetrahedral as shown in a • (a) tetrahedron • (b) ball-and-stick model • (c) space-filling model • (d) expanded structural formula Basic Chemistry 8 Copyright © 2011 Pearson Education, Inc. Organic Molecules In organic molecules with more carbon atoms, • valence electrons are shared • covalent bonds form between C atoms • covalent bonds form between C and H atoms H H H H •• •• HCCH •• 9 C C H •• H H Basic Chemistry H H H Ethane, CH3─CH3 Copyright © 2011 Pearson Education, Inc. Tetrahedral Structure of Ethane In VESPR, two carbon atoms in ethane each have a tetrahedral shape as shown in a • (a) tetrahedron • (b) ball-and-stick model • (c) space-filling model • (d) expanded structural formula Basic Chemistry 10 Copyright © 2011 Pearson Education, Inc.
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