May 30, 2011

Hello everyone! Hope all of you are doing good. Gosh can you believe that school is almost over!!! OMG!! lol :) So let's get going right away, in class yesterday we learned about Alkenes & Alkynes.

Alkenes and Alkynes
- Carbon can form double and triple bonds with Carbon atoms.
- When multiple bonds form, fewer hydrogens are attached to the Carbon atom.
- The position of the double/triple bonds always has the lowest number and is put in front of the parent chain.

Alkenes
- Alkenes are hydrocarbons with one or more double bonds located between carbon atoms leading to an "unsaturated" hydrocarbon.
- The ending is changed from -ane (alkane) to -ene for alkenes
- ex. CH2 = CH2 equals to ethene
- With Alkenes, some molecules have the same structure but different geometry. This is called Geometric Isomers.
- If two adjacent carbons are bonded by a double bond AND have side chains on them two possible compounds are possible = Cis or Trans.
- Cis: If the larger groups are both above or below the plane of the bond.
- Trans: If the larger groups are across the plane of the bond.
- If there are two identical groups on either end of the double bond, there is no need for cis or trans.

Alkynes
- Alkynes are hydrocarbons with one or more triple bonds located between carbon atoms leading to an "unsaturated" hydrocarbon.
- The ending is changed from -ane (alkane) to -yne for alkenes
- ex. CH =(add a dash to the equal sign for the triple bond aka three lines) CH equals to ethyne

Now here are some images:
















Videos:
1) http://www.youtube.com/watch?v=l6m7zOto9oU
2) http://www.youtube.com/watch?v=KWv5PaoHwPA&feature=related
3) http://www.youtube.com/watch?v=6NygjuEFkIc
4) http://www.youtube.com/watch?v=3cfVBC2pS38&feature=relmfu
5) http://www.youtube.com/watch?v=jF46f8vkJPg&feature=related
6) http://www.youtube.com/watch?v=ryTCHJIi6d8&feature=related

Worksheets:
1) http://www.gahrhs.org/ourpages/auto/2010/5/28/39679088/Alkene%20Alkyne%20worksheet.pdf
2) http://www.pkwy.k12.mo.us/west/teachers/anderson/pack10/WS107.pdf
3) http://fcw.needham.k12.ma.us/~Janet_Fasano/FOV1-00108B66/FOV1-0010CD86/Alkene%20and%20Alkyne%20Worksheet.pdf
4) http://ewalerko.net/grs0025t.pdf

Well that is it.... for now!! Have a great day everyone! :)