| http://www.w3.org/ns/prov#value | - As further shown in U.S. Pat. No. 3,879,428, the aromatic bis(ether phthalimide)s of formula (2) can be made by effecting reaction between phthalimides of the formula, ##STR6## where Z is a radical selected from the class consisting of nitro, halo, fluoro, bromo, etc., and R1 is as previously defined, and alkali diphenoxide of the formula,
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