chapter2 - CHM 227 2.0 Organic Compounds a First Look...

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CHM 227 2.0 Organic Compounds a First Look Problems CHP 2: 2.1, 4-21, 27-29, 31-35, 38, 46. How atoms bond in molecules. How structural formulas depict organic molecules and possible isomers. How the structure of organic molecules relates to the physical properties. What are functional groups? 2.1 Common Bonding Situations. Molecules that obey the octet rule are typically stable while formal charges within a molecule are destabilizing. Figure 2.1 a. H almost always has one bond. b. C is most stable with four bonds. Figure 2.2 a. N usually has one unshared pair of electrons and three bonds. b. O usually has two unshared pairs of electrons and two bonds. c. Halogens usually have one bond and three lone pairs of electrons.
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2.2 Bond Strengths and Lengths One measure of bond strength is the Bond Dissociation Energy (BDE). Table 2.1 and 2.2 1. Shorter bonds are stronger. 2. Bonds between H and C, N, and O are strong. 3.
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This note was uploaded on 04/17/2009 for the course CHM 227 taught by Professor Rosen during the Fall '08 term at Rhode Island.

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chapter2 - CHM 227 2.0 Organic Compounds a First Look...

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