Tsantrizos-Lectrure%206-Introduction%20to%20Aromatic%20Chemistry

Tsantrizos-Lectrure%206-Introduction%20to%20Aromatic%20Chemistry

Info iconThis preview shows pages 1–8. Sign up to view the full content.

View Full Document Right Arrow Icon

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

View Full Document Right Arrow Icon

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

View Full Document Right Arrow Icon

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

View Full Document Right Arrow Icon

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

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: ORGANIC CHEMISTRY 211 / 212 TSANTRIZOS - Lecture 6 troduction to Aromatic Chemistry troduction to Aromatic Chemistry Introduction to Aromatic Chemistry Introduction to Aromatic Chemistry November 4 th , 2009 ORGANIC CHEMISTRY 212 Chapters 14: AROMATIC COMPOUNDS Structure of Benzene - Aromaticity H H H H H H H H H H H H German Organic Chemist August Kekulé 1865 Br Br Br Br Br Br Br Br Br 2 Benzene does NOT react like an alkene Cyclooctatetraene is NOT aromatic! Relative Heat of Hydrogenation E N T H A Expected value for a triene ~ -360 kJ/mol L P Y Δ H o = -120 kJ/mol Δ H o = -232 kJ/mol Δ H o = -208 kJ/mol product Benzene H H H H H H H H H H H H Best representation of the correct structure Benzene H H H H H H H H H H H H Best representation of the correct structure δ- δ- δ + δ + Hückel’s Rule for Aromaticity 4n + 2 π electrons Planar conjugated double bonds that can be represented by resonance structures i.e. delocalized electrons δ- δ- δ + δ + Best representation of the correct structure German Physicist Erich Hückel 1931 more than 60 years After Kekulé Aromatic & Non-Aromatic Annulenes...
View Full Document

{[ snackBarMessage ]}

Page1 / 28

Tsantrizos-Lectrure%206-Introduction%20to%20Aromatic%20Chemistry

This preview shows document pages 1 - 8. Sign up to view the full document.

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