alcohols

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alcohols

  1. 1. ETeMS 2006 <ul><li>THEME : </li></ul><ul><li>INTERACTION BETWEEN </li></ul><ul><li>CHEMICALS </li></ul><ul><li>LEARNING AREA : </li></ul><ul><li>CARBON COMPOUND </li></ul><ul><li>LEARNING OBJECTIVE : </li></ul><ul><li>ANALYSING ALCOHOL </li></ul>
  2. 2. What is Alcohol ? <ul><li>Alcohol is a group of organic compound </li></ul><ul><li>which is an important non-hydrocarbon. </li></ul><ul><li>Compared to another hydrocarbon, alcohol </li></ul><ul><li>contains an additional element. It is an oxygen . </li></ul><ul><li>The process to produced alcohol from </li></ul><ul><li>carbohydrate is called fermentation . </li></ul>
  3. 3. <ul><li>C n H 2n+1 OH </li></ul><ul><li>n = 1, 2, 3, 4 </li></ul><ul><li>Example: </li></ul><ul><li>C 1 H 2(1)+1 OH </li></ul><ul><li>C 1 H 3 OH @ CH 3 OH </li></ul><ul><li>(methanol) </li></ul>General Formula of Alcohol n= 1
  4. 4. Functional Group <ul><li>Hydroxyl Group (-OH) </li></ul><ul><li>Example: </li></ul><ul><li>H H CH 3 CH 2 CH 2 CH 2 OH </li></ul><ul><li>H- C- C- OH butanol </li></ul><ul><li>H H </li></ul><ul><li>ethanol </li></ul>
  5. 5. Name Molecular Formulae of Alcohol <ul><li>Name Molecular Formulae </li></ul><ul><li>1. Methanol CH 3 OH </li></ul><ul><li>_______ CH 3 CH 2 OH </li></ul><ul><li>_______ CH 3 CH 2 CH 2 OH </li></ul><ul><li>_______ CH 3 CH 2 CH 2 CH 2 OH </li></ul>? ? ? Ethanol Propanol Butanol For the straight chain of alcohol its name come from an alkane’s name which is replaced by “-ol” ending instead of “-a”.
  6. 6. Isomerism in Alcohol <ul><li>Isomer is a molecule which has similar molecular formula but different molecular structure. </li></ul><ul><li>Ethanol & Methanol do not have any isomer </li></ul><ul><li>The increasing of number of carbon atom will increase the isomer number in alcohol molecule. </li></ul><ul><li>This phenomenon happened because: </li></ul><ul><li>a) the position of hydroxyl group (-OH) </li></ul><ul><li>b) the difference of carbon chain structure </li></ul>
  7. 7. Example: Isomer of butanol <ul><li>Butanol C 4 H 9 OH </li></ul>1 2 H H H H H- C - C – C – C – OH H H H H H H H H H - C - C – C – C – H H OH H H Butan-1-ol Butan-2-ol
  8. 8. Isomer of butanol <ul><li>H H H </li></ul><ul><li>H - C – C – C – OH </li></ul><ul><li>H H </li></ul><ul><li>H - C - H </li></ul>H 3 2-methyl propan- 1-ol
  9. 9. Isomer of butanol H OH H H - C – C – C – H H H H - C - H H 4 2-methyl propan- 2-ol
  10. 10. <ul><li>Answer all the question below: </li></ul><ul><li>1. What is the meaning of alcohol? </li></ul><ul><li>2. State the general formula of alcohol. </li></ul><ul><li>3. State the functional group of alcohol. </li></ul>WORKSHEET 1 Non-hydrocarbon organic compound C n H 2n+1 OH Hydroxyl (OH)
  11. 11. <ul><li>4. Name the structural of alcohol given below. </li></ul><ul><li>CH 3 CH 2 CH 2 CH 2 CH 2 OH </li></ul>WORKSHEET 1 I want more 5. Draw the molecular structure of Butan-2-ol Pentan-1-ol CH 3 CH 2 CH 2 CH 3 OH
  12. 12. That’s all for today… thank you Prepared By : CHEMISTRY ETeMS’06

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