2486938
Descripción
Fichas por sferrier96, actualizado hace más de 1 año
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Creado por sferrier96
hace casi 11 años
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| Pregunta | Respuesta |
| diol +dicarboxylic acid = | polyester |
| terylene = | ethane-1,2-diol + benzene-1,4-dicarboxylic acid |
| is terylene a polyester,polypeptide or polyamide? | polyester |
| polyamide= | diaminoalkane (diamine) + dicarboxylic acid |
| name two polyamides | nylon-6,6 and Kevlar |
| nylon-6,6 = | 1,6-diaminohexane + hexane-1,6-dicarboxylic acid |
| Why is better to use an acyl chloride instead of a carboxylic acid when creating polyamides or polyesters? | *faster reaction - the c-cl bond is more polar so the cl- is a better leaving group hence making the acyl chloride more reactive. *better yield - HCL gas is produced instead of water. Being a gas it can escape the mixture so the reaction goes to completion instead of an equilibrium being set up. |
| Kevlar = | benzene-1,4-dicarboxylic acid + benzene-1,4-diamine |
| why are polyamides biodegradable but polyalkenes are not? | Polyalkenes contain non-polar c-h bonds with cannot be attached by nucleophiles. In polyamides, the polar bonds (i.e. C-N and C-O bonds) which can be attacked by nucleophiles. |
| what do you add to a dicarboxylic acid to produce a diacyl chloride? | PCl5 |
| how to form a polypeptide | add two amino acids together |
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