“…82 When the reaction was performed neat at 65 °C, the [Fe 3 O(Benzoate) 6 (H 2 O) 3 ]NO 3 (7)/GC system was superior to currently employed catalysts such as TBAB 83 or triethylamine (Et 3 N). 81 Importantly, it performed significantly better than the other common alternative onium halide catalysts tested, including PPh 4 Br ( Table 8 , entries 1–6). After 3 hours, the acid was almost completely consumed by the 7/GC catalyst, whereas TBAB led to 47% of product formation and PPh 4 Br reached 60% conversion to the product in the same time period.…”