Reaction: Ferrocene was added to flask (0.09 grams). Next, acetic anhydride (0.3

Question

Reaction: Ferrocene was added to flask (0.09 grams). Next, acetic anhydride (0.35 mL) was added and followed by 85% phosphoric acid (0.10 mL). Solution was stirred for ten minutes at 100 degrees Celsius. Distilled water (0.5 mL) was added after flask was cooled to ambient temperature and then placed in an ice bath. 15 drops of 3M sodium hydroxide solution were added and a pH indicator paper was used to ensure it had a neutral pH.

Question: 3 M sodium hydroxide is used to neutralize the reaction mixture. What compounds (give proper names) are being neutralized?

Explanation / Answer

Ferrocene undergoes friedel crafts acylation in presence of phosphoric acid.

The products are acetylferrocene and acetic acid.

The volume of 3M aqueous sodium hydroxide needed to neutralize the acetic acid and phosphoric acids in the synthesis of acetyl-ferrocene.

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