{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

SCAN0004 - 3H2 —’ m/Wégjil Predicted AH°=-360 kJ/mo...

Info icon This preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
Image of page 1
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: + 3H2 —’ m/Wégjil Predicted: AH°= -360 kJ/mo! Observed. AH°- - —208 lemol The observed value iM ess!! This energy difference is the stabilization of benzene. Cepyrighx Q The Meat raw Hi it C: rrpanies Inc. Permission required for repmduelion or disfiay, commonly referred to as the resonance stabilization (or resonance energy) of benzene All aroma compounds have large resonance sta 1 zation. : 1 An imaginary molecule, cyclohexaniene benzene Fig. 112/ pg 429 Modern theories of the structure of benzene: 1. Resonance Explanation: (read ch 11.3) Let's reconsider Kekulé's 1,2-dibromobenzene structures. -E wumfiff @WQ% .1 31:: SEE: a 0M? vesmm semi: 3% The only difference between these two structures is the position of the electrons. Thu are resonance forms, and neither one by itself correctly describes the bonding in the ,m, molecule The resonance hybrid would be an average of the two resonance structures Analogous, for benzene the two 2 resonance forms are: tie ...
View Full Document

{[ snackBarMessage ]}