Abstract
The two-phase reaction of benzoyl chloride (PhCOCl) and benzoate ion with pyridine 1-oxide (PNO) as the inverse phase transfer catalyst yields both the substitution product (benzoic anhydride) and the hydrolysis product (benzoic acid). A high yield (>95%) of benzoic anhydride can be obtained if a polar organic solvent like dichloromethane is used. Under appropriate conditions, this reaction follows the rate law-d[PhCOCl] org /dt =(k h +k c [PNO] iaq )[PhCOCl] org
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