reacting the product obtained in step with acid chloride ClCOn COCl in a 4 to 1 mole ratio within an inert atmosphere at about room temperature for about 0.5 to 2 hours to obtain {HEAD ~ a keto} ylid having the formula: ##STR5## ; and having the keto ylid under a vacuum, at a temperature ranging from about 100° to 300° C. for {TAIL ~ a period} of about 6 to 12 hours, thereby obtaining a F phenylalkylene oxide diacetylene having the formula C6 F5 C.tbd 
reacting the product obtained in step with acid chloride ClCOn COCl in a 4 to 1 mole ratio within an inert atmosphere at about room temperature for about 0.5 to 2 hours to obtain { HEAD ~ a keto } ylid having the formula : # # STR5 # # ; and having the keto ylid under a vacuum , at a temperature ranging from about 100 ° to 300 ° C. for { TAIL ~ a period } of about 6 to 12 hours , thereby obtaining a F phenylalkylene oxide diacetylene having the formula C6 F5 C.tbd
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