1 / 8

Resonance and Line Structures

Resonance and Line Structures. [HCO 2 ] -. Any common octet breaking atoms? How many electrons are present? What is the central atom? Draw a skeletal structure Add electrons: do you have enough to give all atoms octets? Yes? Then minimize formal charges if needed.

marsha
Download Presentation

Resonance and Line Structures

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Resonance and Line Structures

  2. [HCO2]- • Any common octet breaking atoms? • How many electrons are present? • What is the central atom? • Draw a skeletal structure • Add electrons: do you have enough to give all atoms octets? • Yes? Then minimize formal charges if needed. • No? Then add double bonds until you have enough electrons. • Is it one that is typically found to have less? • Is there any reason you chose those double bonds rather than placing it elsewhere? • No? Then draw resonance structures to show all equally likely structures • Label each with the formal charge

  3. O3 • Any common octet breaking atoms? • How many electrons are present? • What is the central atom? • Draw a skeletal structure • Add electrons: do you have enough to give all atoms octets? • Yes? Then minimize formal charges if needed. • No? Then add double bonds until you have enough electrons. • Is it one that is typically found to have less? • Is there any reason you chose those double bonds rather than placing it elsewhere? • No? Then draw resonance structures to show all equally likely structures • Label each with the formal charge

  4. [SO3]2- • Any common octet breaking atoms? • How many electrons are present? • What is the central atom? • Draw a skeletal structure • Add electrons: do you have enough to give all atoms octets? • Yes? Then minimize formal charges if needed. • No? Then add double bonds until you have enough electrons. • Is it one that is typically found to have less? • Is there any reason you chose those double bonds rather than placing it elsewhere? • No? Then draw resonance structures to show all equally likely structures • Label each with the formal charge

  5. Back through N2O • Any common octet breaking atoms? • How many electrons are present? • What is the central atom? • Draw a skeletal structure • Add electrons: do you have enough to give all atoms octets? • Yes? Then minimize formal charges if needed. • No? Then add double bonds until you have enough electrons. • Is it one that is typically found to have less? • Is there any reason you chose those double bonds rather than placing it elsewhere? • No? Then draw resonance structures to show all equally likely structures • Label each with the formal charge

  6. Line Structures: CH3CHCH2COOH • Rules • The end of a line, or a corner is a carbon • All hydrogens attached to a carbon are assumed to be there. Do not draw them. • Don’t forget the three hydrogens attached to the carbon at an end of a line are there! • Heteroatoms: aka atoms other than C and H, need to be written in. • All hydrogens attached to heteroatoms must be drawn in.

  7. Line Structures: NH2CH2CH(OH)CH3 • Rules • The end of a line, or a corner is a carbon • All hydrogens attached to a carbon are assumed to be there. Do not draw them. • Don’t forget the three hydrogens attached to the carbon at an end of a line are there! • Heteroatoms: aka atoms other than C and H, need to be written in. • All hydrogens attached to heteroatoms must be drawn in.

  8. Benzene • C6H6 • 6-membered ring • Draw the lewis structure • Be sure to include any resonance structures • Draw the line structure • Be sure to include any resonance structures

More Related