Lecture 27 - Resonance and Formal Charge

Lecture 27 - Resonance and Formal Charge - Lec 27: Lec-27:...

Info iconThis preview shows pages 1–6. Sign up to view the full content.

View Full Document Right Arrow Icon
Lec-27: Resonance & Formal Charge Lec 27: Resonance & Formal Charge Roy A. Lacey, Stony Brook University; Che 131, Fall 2011 1 Recap Roy A. Lacey, Stony Brook University; Che 131, Fall 2011 2
Background image of page 1

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

View Full DocumentRight Arrow Icon
Drawing Lewis Structures Hydrogen and the halogens bond once Additional handy rules ± Hydrogen and the halogens bond once. ± The oxygen group bonds twice. ± The nitrogen group bonds three times. So does boron. The carbon group bonds four times ± The carbon group bonds four times. Roy A. Lacey, Stony Brook University; Che 131, Fall 2011 3 Drawing Lewis Structures NO 2 + #valence electrons = 16 i) Draw skeletal structure ii) Satisfy octet rule > @ ONO ± Roy A. Lacey, Stony Brook University; Che 131, Fall 2011 4
Background image of page 2
A. 1 nonbonding pair on carbon B 2 nonbonding pairs on nitrogen #ve = 10 B. C. 1 nonbonding pair on nitrogen D. 2 nonbonding pairs on carbon 5 Roy A. Lacey, Stony Brook University; Che 131, Fall 2011 Bond Types Electrons are shared equally only in pure covalent bonds Roy A. Lacey, Stony Brook University; Che 131, Fall 2011 6 The bigger the difference in electronegativity between the elements, the more polar the compound is.
Background image of page 3

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

View Full DocumentRight Arrow Icon
Electronegativity ` Electronegativity is a measure of an element’sab i l ity Electronegativity is a measure of an element s ability to attract bonding electrons. It is used for predicting the degree to which bonding pairs of electrons are shared unequally. Roy A. Lacey, Stony Brook University; Che 131, Fall 2011 7 Electronegativity Increase se Increa Note the periodic trend of electronegativity Roy A. Lacey, Stony Brook University; Che 131, Fall 2011 8
Background image of page 4
Electronegativity `
Background image of page 5

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

View Full DocumentRight Arrow Icon
Image of page 6
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 03/12/2012 for the course CHEMISTRY 131 taught by Professor Lacey during the Fall '11 term at SUNY Stony Brook.

Page1 / 12

Lecture 27 - Resonance and Formal Charge - Lec 27: Lec-27:...

This preview shows document pages 1 - 6. Sign up to view the full document.

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