CHEM 2OB3 Chapter Notes - Chapter 13: Sodium Borohydride, Hydroxy Group, Phosphorus Tribromide
26 Jul 2015
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Cyclic alcohols: phenol" can be used as the. Miscibility: (except methanol) regions via h-bonding o chain) = solubility. Except butanol is consider soluble (certain o volume of butanol can dissolve in a specified amount of water at room temperature) not miscible. Methanol: heating wood in the absence of air or co2 + h2; toxic. Ethanol: fermentation of grains or fruits; drinking. Compare via conjugate base, alkoxide ion: negative charge on oxygen atom. Acidity: hydrogen halides > alcohols > amines and alkanes. Reagents for deprotonating alcohol: strong base (nah) H- deprotonates the alcohol to generate hydrogen gas: li, na or k. Metals react with alcohol to liberate h2, producing alkoxide ion. Phenoxide ions can be deprotonated by a hydroxide ion. Attachments to electroneg atoms = acidity. Less steric hindrance allows for stability by the solvent. Secondary alcohols: in sn1 condiions, its too slow; in sn2, favour elimination over substitution. Oxidation: change to a more positive charge.
