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Chem 353-31 - shift 6 Explain the 18 electron rule as it...

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Post Lab Questions – Friedel-Crafts (You may write the answers only in your notebook for the post lab questions if you choose.) 1. Propose a mechanism for the internal Friedel-Crafts reaction shown below. 2. After quenching your solution with ice, the resulting aqueous layer became acidic. Use a chemical equation to explain how the solution became acidic. 3. Answer question # 4 at the end of the reading for technique 18. 4. Explain why cyclopentadiene has such an unusually low pK a value. 5. Why do all of the hydrogens for cyclopentadienide anion have the same chemical
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Unformatted text preview: shift? 6. Explain the 18 electron rule as it pertains to transition metal complexes. 7. The bonding in ferrocene involves sharing of the 6 electrons from each cyclopentadienyl ring with the iron atom. Based on the electronic configuration of the iron species in ferrocene, show that a favorable 18-electron noble gas configuration is established at the iron atom. 8. Would you predict that bis(benzene)chromium (shown below) to be a stable compound? Explain. Cr(0)...
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