01 - Chemistry 5.12 Spring 2003 Lectures #1 & 2,...

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Chemistry 5.12 Spring 2003 Lectures #1 & 2, 2/5,7/03 Outline • Discuss General Class Information (Professor Imperiali) • General Introduction to Organic Chemistry I. ±Review of Lewis Bonding Theory ( Read Chapter 1 ) A. Ionic Bonding ( 1-3A,6,8 ) B. Covalent Bonding ( 1-3B,4 ) 1. Multiple Bonding ( 1-5 ) 2. Formal Charge ( 1-7 ) C. Short-Hand for Chemists 1. Line-Angle Formulas: Simplified Structures ( 1-10 ) 2. Dashes and Wedges: Molecules in 3-D ( 2-5 ) 3. Curved Arrow Formalism: Electrons in Motion ( 1-14 ) II. ±Resonance ( 1-9 ) A. Rules for Drawing Resonance Structures B. Relative Energy of Resonance Structures C. Structure and Reactivity from Resonance Suggested Problems: 1-25,36,39,41 Problem Set #1 Posted: Due Monday 2/10 by 4pm Organic Chemistry 5.12 Spring 2003 Prof. Barbara Imperiali Dr. Sarah Tabacco Text: Organic Chemistry, L.G. Wade, Jr., 5th Ed. Recitations: Twice a week, beginning second week. Section changes should be made through the 5.12 website. All changes must be made by Friday 2/14. Problem Sets: Turn in to TA's box in Chem. Ed. office by 4pm on the due date. Lowest grade will be dropped. No late work accepted. Midterms: During class period. Lowest grade will be dropped. No make-up exams. Exam #1 Friday, 2/21 Exam #2 Friday 3/14 Exam #3 Monday, 4/14 Exam #4 Monday, 5/5 Grading: Upon request, exams can be regraded within one week. Problem sets will not be regraded. Problem Sets: 10% Midterm Exams: 50% Final Exam: 40% 1
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Organic Chemistry: What is it? 1780: Organic compounds very complex and only obtained from living sources (vitalism) Vitalism: Belief that a "magic" vital force, present in plants and animals, is necessary for the synthesis of organic compounds 1789: Antoine Laurent Lavoisier observed that organic compounds are composed primarily of carbon and hydrogen 1828: Friedrich Wohler synthesized an organic compound (urea) from inorganic compounds (lead cyanate and ammonium hydroxide). Pb + NCO NH 4 + OH NH 4 + NCO C O H 2 N NH 2 heat lead cyanate ammonium hydroxide ammonium cyanate urea inorganic organic Modern organic chemistry is the chemistry of carbon compounds. "The Age of Organic Chemistry" • > 95% of All Known Compounds Composed of Carbon • Organic Chemistry Crucial to Our Way of Life: Clothing, Materials (Polymers), Petroleum, Medicine, OUR BODIES • > 50% of Chemists Are Organic S T R U C T U R E Determining the Way in Which Atoms Are Put Together in Space to Form Complex Molecules S Y N T H E S I S Building Complex Molecules From Simple Molecules Using Chemical Reactions M E C H A N I S M Understanding the Reactivity of Molecules: How and Why Chemical Reactions Take Place 2
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Why Carbon? • Carbon forms a variety of strong covalent bonds to itself and other atoms. • This allows organic compounds to be structurally diverse.
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01 - Chemistry 5.12 Spring 2003 Lectures #1 & 2,...

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