lecture 3 - Organic Lecture Series CH 310/318 M LECTURE 3...

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Organic Lecture Series 1 CH 310/318 M LECTURE 3 Textbook Assignment: Chapter 2 Today’s Topics: Hybridization & Resonance Hybridization & Resonance Notice & Announcements: 1) Problems 4 Credit to be posted this weekend Organic Lecture Series 2 • Contain an amino group amino group; an sp 3 -hybridized nitrogen bonded to one, two, or three carbon atoms. – An amine may by 1°, 2°, or 3°. CH 3 NH H 3 3 3 NC H 3 3 Methylamine (a 1° amine) Dimethylamine (a 2° amine) Trimethylamine (a 3° amine) : Amines Amines
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Organic Lecture Series 3 Aldehydes Aldehydes and and Ketones Ketones • Contain a carbonyl (C=O) carbonyl (C=O) group. group. CH O Functional group Acetone (a ketone) 3 -C-H 3 -C-CH 3 OO C O Functional group Acetaldehyde (an aldehyde) : : : : Organic Lecture Series 4 Carboxylic Acids Carboxylic Acids • Contain a carboxyl ( carboxyl ( -COOH) COOH) group. group. CO O HC H 3 -C-O-H O 3 COOH 3 2 H :: or or Acetic acid (a carboxylic acid) Fu ncti o nal group
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Organic Lecture Series 5 • Ester: Ester: A derivative of a carboxylic acid in which the carboxyl hydrogen is replaced by a carbon group. CO O Functional group CH 3 -C-O-CH 2 -CH 3 Ethyl acetate (an ester) O Carboxylic Esters Carboxylic Esters Organic Lecture Series 6 • Carboxylic amide Carboxylic amide, commonly referred to as an amide amide: A derivative of a carboxylic acid in which the -OH of the -COOH group is replaced by an amine. – The six atoms of the amide functional group lie in a plane with bond angles of approximately 120°. 3 -C-N-H H Acetamide (a 1° amide) O CN O Fu ncti o nal group Carboxylic Amide Carboxylic Amide
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Organic Lecture Series 7 • These molecules have polar bonds and are polar molecules. N H H H O H H Water μ = 1.85D Ammonia μ = 1.47D direction of dipole moment Polar and Polar and Nonpolar Nonpolar Molecules Molecules Organic Lecture Series 8 – Formaldehyde has polar bonds and is a polar molecule. Formaldehyde μ = 2.33 D HH C O Polar and Polar and Nonpolar Nonpolar Molecules Molecules
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Organic Lecture Series 9 Covalent Bonding Covalent Bonding -Combined VB & MO Combined VB & MO • Bonding molecular orbital: A MO in which electrons have a lower energy than they would have in isolated atomic orbitals.
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This note was uploaded on 10/20/2011 for the course CH 310 M taught by Professor Iverson during the Fall '09 term at University of Texas at Austin.

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lecture 3 - Organic Lecture Series CH 310/318 M LECTURE 3...

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