ch13B_Recap_Quiz - Created by Professor William Tam...

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Unformatted text preview: Created by Professor William Tam & Dr. Phillis Chang Ch. 13 -Chapter 13B Chapter 13B Conjugated Unsaturated Conjugated Unsaturated Systems Systems Ch. 13 -7B. B. Conformations of 1,3-Butadiene Conformations of 1,3-Butadiene (s-cis) (s-trans) H H (less stable) cis trans single bond single bond Ch. 13 -7C. 7C. Molecular Orbitals of 1,3-Butadiene Molecular Orbitals of 1,3-Butadiene Ch. 13 -1. The Stability of Conjugated Dienes Conjugated double bonds are more stable than isolated ones. 2 + 2 H 2 2 2 x (-127)=-254 H o (kJmol-1 ) =-239 Difference 15 + 2 H 2 Ch. 13 -1. UltravioletVisible Spectroscopy Ch. 13 -9B. 9B. UV UV Vis Spectrophotometers Vis Spectrophotometers Ch. 13 -Ch. 13 -. . Absorption Maxima for Nonconjugated Absorption Maxima for Nonconjugated and Conjugated Dienes and Conjugated Dienes Ch. 13 -1. Electrophilic Attack on Conjugated Dienes: 1,4 Addition Cl H Cl H 1 2 3 4 H Cl 25 o C + (78%) (1,2-Addition) (22%) (1,4-Addition) Ch. 13 - 1 (a) Cl H Mechanism Cl H + H (a) H (b) H X H + + Cl (b) Cl H (a) (b) Ch. 13 - 1 Ch....
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This note was uploaded on 02/06/2011 for the course CHEMISTRY 104,224 taught by Professor Stevens,kawamura during the Spring '11 term at CUNY Hunter.

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ch13B_Recap_Quiz - Created by Professor William Tam...

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