Lecture 11 - , but avoid it by adopting a non-planar...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
1 First Exam Tomorrow! February 17 th 6-7:30 PM 120 Budig Chapters 15-17 36% Multiple Choice 64% Handwritten Reading for Friday ± Chapter 18: 18.5-18.7 Dr. Benson’s Thursday office hours cancelled this week Mon. 6:00-7:30 pm MAL 3092 Tues. 2:30-4:00 PM MAL 2007 Wed. 5:00-6:30 PM MAL 2001 Thurs. 9:30-10:50 AM MAL 1003 Sat. 11:00 AM-1:00 PM MAL 2007 PLUS Sessions THIS WEEK Chapter 17 Benzene and Aromatic Compounds *Cyclic, planar, completely conjugated, with 4n + 2 π electrons * Stabilized by conjugation Aromatic Compounds [18]-Annulene Benzene Pyrrole Cyclopentadienyl anion Tropylium ion Bridged [10]-Annulene *Cyclic, planar, completely conjugated, with 4n electrons * Destabilized by conjugation Anti-aromatic Compounds Cyclobutadiene Cyclopentadienyl cation
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
2 Mostly, compounds that would be anti-aromatic if planar
Background image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: , but avoid it by adopting a non-planar structure Also includes molecules with 4n + 2 electrons that cant be planar Non-aromatic Compounds H H [10]-Annulene Cyclooctatetraene Contain 2 or more fused rings Huckels rule is not applicable Polycyclic Aromatic Hydrocarbons N Predicting Aromaticity (17.10) The Inscribed polygon method , allows one to determine relative energies of MOs for cyclic, completely conjugated compounds. Also known as the Frost Circle Method Chapter 18 Electrophilic Aromatic Substitution Free Energy Diagram for Electrophilic Aromatic Substitution (EAS) EAS Reactions (18.1) 1)Halogenation (Br, Cl) 2)Nitration 3)Sulfonation 4)Friedel-Crafts alkylation 5)Friedel-Crafts acylation...
View Full Document

This note was uploaded on 10/24/2011 for the course CHEMISTRY 623 taught by Professor Benson during the Spring '11 term at Kansas.

Page1 / 2

Lecture 11 - , but avoid it by adopting a non-planar...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online