Chemistry Topic Alcohol Thiol Alcohol 2012 2013 Alcohol

Chemistry Topic: Alcohol & Thiol Alcohol 2012 => 2013

Alcohol (Continue) • 2. Naming (Continue) • + ថន កទ ង៣ន អ លកល • - ថន ក I: ម នអ តមក បន ១ ភជ បនងអ តមក បនន ទ • R-CH 2 OH )R ជ ករម Alkyl( Example: CH 3 -OH : Methanol CH 3 -CH 2 OH : Ethanol CH 3 -CH 2 OH : 1 -Propanol

Alcohol (Continue) 3. Chemical Properties (លកខណ គម ) (តចប ) ខ. ដកទក ១ មល គលព ២មល គលអ លកល O CAl 2 H 22 – 3 O – C 2 H 5 + H 2 O Example 1: C 2 H 5 – OH +HO – C 2 O 5 250 ◦c HC 2 SO ខ ប 2 H 2 – 4 O – C 2 H 5 + H 2 O Example 2: C 2 H 5 – OH +HO – C 2 H 5 140 ◦c Hydroxy ethane ជ សម សធ តសររ ងគ មយដ លសថតកនងករម 3. 3 បរតកមមជ មយ Ether (R 1 – O – R 2) Hydrogen Halogenous Alcohol ធវ បរតកមមជ មយ Hydrogen Halogenous (HX) បងក តប នជ Halogenous។ R – OH + HX R – X + H 2 O Alcohol Hydrogen Halogenous Alkyl Halogenous Example: CH 3 – CH 2 OH + HCl CH 3 – CHCl + H 2 O Alkyl

Thiol Alcohol 1. Introduction Thiols ឬ អ ចហ ថ Thiol alcohol ដ លន កនងន អ តមសព នធរ ( ទ ជនសអ តម អកសស ន ( Oxygene((-SH)។ Alcohol R – OH Thiols C 2 H 5 SH Ethanthiol or Ethylmercaptan R – SH Sulfer(

Thiol Alcohol (Con. ) 3. Nomenclature ក រហ ឈម ដ យបនថ មនវ បចចមបទ « Thiol «ទ ខ ងករ យពក Example: CH 3 SH : methanthiol ក រហ ឈម ដ យបនថ មនវព កយ Mercaptan. Example: CH 3 SH : methylmercaptan ក រហ ឈម ដ យបរ ព កយ « mercapto- « ជ បពវបទ : 4 -Mercaptobenzyl Alcohol Example: OH O HS Alkane

Thiol Alcohol (Con. ) 4. Chemical Properties (លកខណ គម បរតកមម R–SH + Na Na ជ មយ R–SH R–SNa + ½ H 2 Sodium Thiol CH 3–SH + Na ន ចព មខ ) CH 3 SNa + ½ H 2 Sodiummethanethiol Na. OH (alcohol មនម នបរតកមមជ មយ R–SH + Na. OH R–SNa + H 2 O Na. OH ទ ត Thiol ម នបរតកមមជ មយ Na)

Thiol Alcohol (Con. ) 5. Preparation (ទងវ ) 1. បរតកមមបក H 2 S ទ ល អ លស ន R–CH=CH 2 + H 2 S R–CHSH–CH 3 Example: CH 3–CH=CH 2 + H 2 S 2. Substitution in a halogenated derivative RX + SH R–SH + X CH 3–CHSH–CH 3

Reference • http: //ion. chem. usu. edu/~tchang/chem 1120_201 0/chapter_13_alcohol. pdf • http: //www. chem. latech. edu/~deddy/chem 121/Alcohols. htm • http: //www. chem. uky. edu/courses/che 232/JEA/ln/4. %20 Alco hols. pdf • http: //www. wavesignal. com/o_chem/Alcohol_1. htm