MWF_3 - Organic Lecture Series CH 310/318 M Textbook...

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
Organic Lecture Series 1 CH 310/318 M LECTURE 3 Textbook Assignment: Chapter 2 Today’s Topics: Hybridization & Resonance Hybridization & Resonance Notice & Announcements: 1) Problem set 1 posted-due on 1/30 (3PM) 2) Dr C office hrs-T Th: 10-11 WEL 4.242 Organic Lecture Series 2 Resonance Resonance • For many molecules and ions, no single Lewis structure provides a truly accurate representation. Ethanoate ion (acetate ion) C O O H 3 C C O O H 3 C - - and : :: : : : :
Background image of page 1

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

View Full DocumentRight Arrow Icon
Organic Lecture Series 3 • Linus Pauling - 1930s – Many molecules and ions are best described by writing two or more Lewis structures. – Individual Lewis structures are called contributing structures. – Connect individual contributing structures by double-headed (resonance) arrows. – The molecule or ion is a hybrid of the various contributing structures. Resonance Resonance Organic Lecture Series 4 Examples: Examples: equivalent contributing structures. equivalent contributing structures. Acetate ion (equivalent contributing structures) Nitrite ion (equivalent contributing : : : : N O - O : N O - : : :: : : C - O CH 3 C O - 3 : : Resonance Resonance
Background image of page 2
Organic Lecture Series 5 • Curved arrow: Curved arrow: A symbol used to show the redistribution of valence electrons. • In using curved arrows, there are only two allowed types of electron redistribution: – from a bond to an adjacent atom.
Background image of page 3

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

View Full DocumentRight Arrow Icon
Image of page 4
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 9

MWF_3 - Organic Lecture Series CH 310/318 M Textbook...

This preview shows document pages 1 - 4. Sign up to view the full document.

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