[chem] proteins
[notes.git] / chem / organic-2.md
index 40a4de8369841b5ab33754962c2dce9a85116126..10dff38692959937703078a6ab34d4636c29cd9c 100644 (file)
@@ -48,7 +48,7 @@ Alkynes: \ce{C_{$n$} H_{$2n-2$}}
   Carboxylic acids & \ce{-COOH} & \chemfig{{\color{blue}R}-C(=[:-30]O)-[:30]O-H}\\\hline
   Ethers & \ce{-O-} & \chemfig{{\color{blue}R}-[:210]O-[:-30]{\color{blue}R}}\\\hline
   Amines & \ce{-NH2} & \chemfig{{\color{blue}R}-N(-[:-30]H)(-[:30]H)}\\\hline
-  Amides & \ce{-CONH2} & \chemfig{{\color{blue}R}-[:30]C(=[:90]O)-[:-30]N(-[:30]H)(-[:-30]H)}\\\hline
+  Amides & \ce{CO-NH} & \chemfig{{\color{blue}R}-[:30]C(=[:90]O)-[:-30]N(-[:30]H)(-[:-30]H)}\\\hline
 \end{tabularx}
 
 
@@ -68,3 +68,41 @@ Alkynes: \ce{C_{$n$} H_{$2n-2$}}
   \chemfig{[:60]{\text{\color{blue}R$^\prime$}}-C(-[:120]{\text{\color{red}R}})=[0]C(-[:-60]{\text{\color{red}R}})-[:60]{\text{\color{blue}R$^\prime$}}}
 \end{tabularx}\end{center}
 
+## Reactions
+
+**Cracking** - split moluecules with heat/pressure/catalyst
+
+### Alkanes
+
+- Relatively inert
+- Non-polar solvent
+- Non-soluble in \ce{H2O}
+- Combusts in \ce{O2} (forms \ce{CO2 + H2O})
+- Reacts with halogens (**substitution** of \ce{H})
+
+### Alkenes
+
+- More reactive than alkanes
+- **Addition reactions**: \ce{C=C} bond is broken (energy released)
+- **Addition polymerisation**
+
+### Alcohols
+
+- Can be formed from haloalkane substitution reaction
+- **Oxidation** (combustion)
+- Oxidation state $\propto$ no. of atoms connected to \ce{C}
+- **Substitution** of functional group, e.g. \ce{ROH + NH3 -> RNH2 + H2O}
+- Primary alcohols oxidise to aldehydes then carboxylic acids
+- Secondary alcohols oxidise to ketones
+
+### Carboxylic acids
+
+- Weak acids
+- **Hydrolysis**: \ce{RCOOH + H2O <=> RCOO^{-} + H2O^{+}}
+- Rxn with amines - carboxylic acid + amine $\rightarrow$ ammonium salt $\rightarrow$ amide + water
+
+### Esterification
+
+- **Condensation reactions** (esterification): \ce{RCOOH + R^{$\prime$}OH -> RCOOR^{$\prime$} + H2O}
+- This is reversed by **hydrolysis**: ester + water $\rightarrow$ carboxylic acid + alcohol
+- Polyesters