Ice-cream Posted August 27, 2005 Share Posted August 27, 2005 Can anyone help me with this question? Which is the active chlorinating species in aromatic chlorination reactions using chlorine in the presence of aluminium chloride? AlCl4+ Cl- AlCl4- Cl+ HCl Link to comment Share on other sites More sharing options...
Yggdrasil Posted August 27, 2005 Share Posted August 27, 2005 Halogenation of aromatic rings proceeds through electrophilic aromatic substitution. This means that an electrophile will react with the nucleophilic pi bonds in the aromatic ring. Based on this info, can you guess which one it is now? Link to comment Share on other sites More sharing options...
Ice-cream Posted August 28, 2005 Author Share Posted August 28, 2005 Does that mean its Cl+...coz electrophiles want e- so they would be positively charged?...i dont think its AlCl4+...is that right? Link to comment Share on other sites More sharing options...
Yggdrasil Posted August 28, 2005 Share Posted August 28, 2005 Yup. Although an AlCl4 compound does form as an intermediate in the chlorination, it's AlCl4- (plus the AlCl4- doesn't directly chlorinate the aromatic ring). Link to comment Share on other sites More sharing options...
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