1 / 11

VSEPR :

VSEPR : Electrons around an atom repel each other, and will move apart as far as possible to have space. The furthest away electrons can get in Carbon’s 4 bonds is 109.5 o apart. 109.5°. The bond angles of carbon are 109.5°.

haile
Télécharger la présentation

VSEPR :

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. VSEPR: Electrons around an atom repeleach other, and will move apart as far as possible to have space. The furthest away electrons can get in Carbon’s 4 bonds is 109.5o apart. 109.5° The bond angles of carbon are 109.5°.

  2. Carbon atoms in alkanes can rotate (twist) freely around each other. Multiplebonds restrict twisting or rotating.

  3. Cis/Trans isomers • Same formula - different arrangement of branches around the double bond. • “cis” or “trans” shows different arrangement. • Sometimes called - Geometric isomers 2-butene

  4. Cis/Transis possible only when each carbonin the double bondhasa ‘bigger’ end between its other bonds. NOT every alkene has a cis or trans configuration. 2-butene

  5. cis - largest alkyl groups on the same side of the double bond. cis-2-butene

  6. trans - largest alkyl groups on opposite sides. trans-2-butene

  7. 2 1 3 4 2-methyl-1-butene DOESN’T have a bigger end on each carbon on the double bond – NO cis/trans

  8. 5 1 4 3 2 cis- 3-methyl-2-pentene

  9. Draw trans-4-octene: C - C - C C - C - C H 6 7 8 C = C H 4 5 C - C - C 1 2 3

  10. cis Draw -4-ethyl-3-methyl-3-heptene: 1 2 C - C - C C - C 5 6 7 C = C C - C 3 4 C

More Related