4 - Factors to consider in judging relative importance of...

Info iconThis preview shows pages 1–16. Sign up to view the full content.

View Full Document Right Arrow Icon
CH 310M/318M – TTh 8am – Lecture 4 – Th 1/24/2008 Reading Assignment : Sections 1.3, 2.1–2.3 Graded Homework : HW#01 deadline = 3:00 p.m. on Mon 1/28 HW#02 deadline = 3:00 p.m. on Thu 1/31 Last Time : Electronegativity (continued…) Polar and nonpolar molecules Exceptions to the octet rule Resonance Two new online handouts (“Functional Groups” & “Organic Nomenclature”) have been posted on the course website. You may find it useful to bring these with you to lecture next week!!! The student American Chemical Society affiliate will be selling molecular models and lab notebooks every day this week, from 9am to 3pm. Look for their table in the 2 nd floor hallway of Welch!!! Textbook Problems : 1.55-1.58, 1.66-1.68 Today : Resonance (continued…) Valence bond theory and hybrid orbitals
Background image of page 1

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

View Full DocumentRight Arrow Icon
Background image of page 2
Background image of page 3

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

View Full DocumentRight Arrow Icon
Background image of page 4
Background image of page 5

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

View Full DocumentRight Arrow Icon
Background image of page 6
Background image of page 7

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

View Full DocumentRight Arrow Icon
Background image of page 8
Background image of page 9

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

View Full DocumentRight Arrow Icon
Background image of page 10
Background image of page 11

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

View Full DocumentRight Arrow Icon
Background image of page 12
Background image of page 13

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

View Full DocumentRight Arrow Icon
Background image of page 14
Background image of page 15

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

View Full DocumentRight Arrow Icon
Background image of page 16
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Factors to consider in judging relative importance of nonequivalent resonance structures : Remember, only electrons move, not atomic nuclei!!! (1) Structures in which all atoms have octets are usually more important than those where the octet rule is not satisfied for all atoms. OCTET STRUCTURES ARE MORE IMPORTANT THAN NON-OCTET STRUCTURES!!! (3) Relative importance of non-octet structures increases with increasing electronegativity difference between atoms. In such cases it is generally better to place negative formal charges on more electronegative atoms, and positive formal charges on less electronegative atoms. (2) All else being equal, structures with minimum formal charges are relatively more important....
View Full Document

This note was uploaded on 04/09/2009 for the course BIO 326R taught by Professor Whiteley during the Spring '08 term at University of Texas at Austin.

Page1 / 16

4 - Factors to consider in judging relative importance of...

This preview shows document pages 1 - 16. Sign up to view the full document.

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